Data analysis in HEP experiments

Contents
Through the analysis of data taken in high energy physics experiments we seek to determine the properties of elementary particles and the probabilities of occurrence of natural phenomena only visible at the scale of the attometer (or electroweak scale). We also search for new phenomena such as the production of new particles (predicted or not by a given theory) or anomalous cross sections or distributions. These measurements can also be used to extract or fit fundamental constants within the context of a given theoretical model, thereby providing the experimental inputs required to address phenomenology of elementary particles.

Most of the time, the processes under study are very rare and suffer from large background contaminations that need to be filtered out by sophisticated online trigger systems and through additional criteria applied on stored data. In order to achieve an optimal strategy for the signal selection, the use of specific observables from the basic reconstructed quantities from the detector is mandatory. The quality of these observables relies on the good calibration of the experimental set-up and on the quality of particle identification and reconstruction software. Furthermore this optimization must be realized while keeping a good understanding of the trigger and reconstruction efficiencies and while keeping the level of systematic uncertainties as low as possible.

Analyses strategies are therefore numerous and depend on the goal(s) to be achieved. They range from very simple and robust (e.g., cut-based analyses techniques) to more elaborated selection strategies which make use of kinematic fitting, multivariate analyses (such as artificial neural networks), or the so-called matrix element method.

Members of CP3 have been actively involved in the analysis of data collected by former CHARM II, CHORUS, ALEPH, DELPHI, H1 and ZEUS experiments. Since many years, members of CP3 participate to the analysis of the data collected by the CMS experiment at the LHC. They cover a wide range of physics topics, from top quark and Higgs boson studies to searches for SuperSymmetry and exotic particles. More recently, the analysis of the data collected by the fixed-target NA62 experiment at the SPS has also begun.

Advanced tools for simulation and data analysis of general interest for the HEP community, like DELPHES and MoMEMta, have been developed and are being maintained at CP3, although released as open-source code.

Projects

a C++ software package to compute Matrix Element weights: MoMEMta

MoMEMta is a C++ software package to compute Matrix Element weights. Designed in a modular way, it covers the needs of experimental analysis workflows at the LHC. MoMEMta provides working examples for the most common final states (Formula: 0, WW, ...). If you are an expert user, be prepared to feel the freedom of configuring your MEM computation at all levels.
MoMEMta is based on:

- C++, ROOT, Lua scripting language
- Cuba (Monte-Carlo integration library)
- External PDFs (LHAPDF by default)
- External Matrix Elements (currently provided by our MadGraph C++ exporter plugin)

Advanced Multi-Variate Analysis for New Physics Searches at the LHC

With the 2012 discovery of the Higgs boson at the Large Hadron Collider, LHC, the Standard Model of particle physics has been completed, emerging as a most successful description of matter at the smallest distance scales. But as is always the case, the observation of this particle has also heralded the dawn of a new era in the field: particle physics is now turning to the mysteries posed by the presence of dark matter in the universe, as well as the very existence of the Higgs. The upcoming run of the LHC at 13 TeV will probe possible answers to both issues, providing detailed measurements of the properties of the Higgs and extending significantly the sensitivity to new phenomena.

Since the LHC is the only accelerator currently exploring the energy frontier, it is imperative that the analyses of the collected data use the most powerful possible techniques. In recent years several analyses have utilized multi-variate analysis techniques, obtaining higher sensitivity; yet there is ample room for further improvement. With our program we will import and specialize the most powerful advanced statistical learning techniques to data analyses at the LHC, with the objective of maximizing the chance of new physics discoveries.

We are part of a network of European institutions whose goal is to foster the development and exploitation of Advanced Multi-Variate Analysis (AMVA) for New Physics searches. The network offers extensive training in both physics and advanced analysis techniques to graduate students, focusing on providing them with the know-how and the experience to boost their career prospects in and outside academia. The network develops ties with non-academic partners for the creation of interdisciplinary software tools, allowing a successful knowledge transfer in both directions. The network studies innovative techniques and identifies their suitability to problems encountered in searches for new physics at the LHC and detailed studies of the Higgs boson sector.

External collaborators: University of Oxford, INFN, University of Padova, Université Blaise Pascal, LIP, IASA, CERN, UCI, EPFL, B12 Consulting, SDG Consulting, Yandex, MathWorks.

Angular asymmetries in ttW production

We take advantage of the large statistics being recorded by the CMS experiment in Run 2 to launch a systematic study of angular asymmetries in the ttW process, which have a potentially large sensitivity to non-SM effects.
In synergy with the CP3 phenomenology group, we aim at reporting our results in a form that can be easily translated in EFT constraints.

Development of a framework for fast simulation of a generic collider experiment: Delphes

Observability of new phenomenological models in High Energy experiments is delicate to evaluate, due to the complexity of the related detectors, DAQ chain and software. Delphes is a new framework for fast simulation of a general purpose experiment. The simulation includes a tracking system, a magnetic field, calorimetry and a muon system, and possible very forward detectors arranged along the beamline. The framework is interfaced to standard file format from event generators and outputs observable analysis data objects. The simulation takes into account the detector resolutions, usual reconstruction algorithms for complex objects (FastJet) and a simplified trigger emulation. Detection of very forward scattered particles relies on the transport in beamlines with the Hector software.

Higgs bosons to ZZ -> 2l 2nu and measurement of the Higgs natural width

The final state containing two Z bosons decaying into a pair of leptons and a pair of neutrinos has been exploited by the CMS experiment at the LHC to produce a number of results related to the Higgs boson, including measurements of related standard model cross sections.

Constraints have been set on the total width of the 125 GeV Higgs boson, using its relative on-shell and off-shell production and decay rates to a pair of Z bosons, where one Z boson decays to an electron or muon pair, and the other to an electron, muon, or neutrino pair. The analysis is based on the data collected by the CMS experiment at the LHC in 2011 and 2012. A simultaneous maximum likelihood fit to the measured kinematic distributions near the resonance peak and above the Z-boson pair production threshold leads to an upper limit on the Higgs boson width of < 22 MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass of 125.6 GeV.

A search for heavy Higgs bosons in the H → ZZ → 2l2ν decay channel, where l = e or µ, has also been performed using data collected in 2015 at the center of mass energy of 13 TeV. No significant excess is observed above the background expectation. The results are interpreted to set exclusion limits on a number of extensions of the standard model scalar sectors: models with an additional electroweak singlet, as well as Type-I and Type-II two-Higgs doublets models.

External collaborators: CMS collaboration.

High energy photon induced interactions at the LHC

High-energy photon-photon and photon-proton interactions at the LHC offer interesting possibilities for the study of the electroweak sector up to TeV scale and the search for processes beyond the Standard Model. After in-depth exploratory studies, we performed using the CMS data first measurement of two-photon muon pair production as well as first ever observation of W boson pairs produced by photon fusion. Now our group is leading unique investigations of quartic couplings between photons and W and Z bosons.

External collaborators: CMS FSQ analysis group and the group of A. Szczurek (Krakow).

LFV/LNV in K+ decays

The NA62 experiment in the North Area of the CERN SPS is now fully operational and taking data. The plan is to collect the highest statistics ever reached for Formula: 0 decays, of the order of Formula: 1 events in the fiducial decay region of the detector until the end of 2018. This high-intensity and high-precision setup makes it possible to probe a number of ultra-rare or forbidden decay channels. Of particular interest to the CP3 group are the LFV/LNV Formula: 2 and Formula: 3 modes.

Many BSM theories predict some degree of LFV, including Supersymmetry or the introduction of massive neutrinos. Furthermore, there are indirect hints for New Physics in the flavor sector, e.g. in the semileptonic decays of B-mesons. Explanations for the observed discrepancies predict effects of LFV in kaon decays. These particular LFV/LNV Formula: 4 processes which at present are not covered by another experiment provide an attractive opportunity to test the SM. Any observable rate for one of these modes would constitute unambiguous evidence for New Physics. Considering the statistics that will be available at NA62 the current limits on their branching-ratios could be improved by at least one order of magnitude.

External collaborators: University of Birmingham.

Search for exotic decays of the Higgs boson to a pair of new light bosons with two muons and two b jets in final states

We search for exotic decays of a Higgs boson to a pair of new light bosons, H->a1a1, where one of the light bosons decays to a pair of muons and the other one decays to a pair of b quarks. Such signatures are predicted in a number of well motivated extensions of the standard model, including the next-to-minimal supersymmetry and generic two Higgs doublet models with an additional scalar singlet.

Search for Higgs boson(s) in CMS at the LHC in the llbb topology

Search for Higgs boson(s) within the Standard Model and beyond and also withing a minimal extension of the scalar sector (2HDM).

The final state under study is a Z decaying into a lepton pair associated with two b-jets. This topology is sensitive to a light SM Higgs via the associate ZH production, as well as a middle mass range SM Higgs boson via the inclusive Higgs production followed by its decay into ZZ with one Z decaying into a lepton pair and the other into bbar.

It is also very sensitive to the production of a non standard heavy Higgs boson decaying into Z plus A (pseudo scalar Higgs boson).

Similar selection (but outside of the Z window) is also sensitive to H->aa->llbb, with "a" a generic light scalar.

External collaborators: CMS collaboration.

Search for Higgs bosons in the ll tau tau final state with the CMS experiment at the LHC

A resonance consistent with the stanadard model Higgs boson with mass of about 125 GeV was discovered in 2012 by the CMS and ATLAS experiments at the LHC. Using the available dataset (2011+2012 LHC runs) evidence was later found of the existence of the SM-predicted decay into a pair of tau leptons. The CP3 Louvain group has been involved in the channel where the Higgs boson is produced in association with the Z boson and decays into a pair of tau leptons.

A search for additional Higgs bosons in the general framework of models with two Higgs doublets (2HDM) was then performed by the same CP3 group using the same final state and the full Run-1 data. Models with two Higgs doublets feature a pseudoscalar boson, A, two charged scalars (H+-) and two neutral (h0 and H0) scalars, one of which is identified with the 125 GeV SM-like Higgs resonance. In some scenarios the most favored decay chain for the discovery of the additional neutral bosons is H0-->ZA-->llττ (or llbb). The search was carried out in collaboration with another group in CP3 who looks at the llbb final state and an update is expected using the Run-2 dataset.

Search for massive long-lived charged particles with the CMS detector at the LHC

The CMS detector at the LHC is used to search for yet unobserved heavy (mass >100 GeV/c$^2$), long-lived (lifetime > 1 ns), electrically charged particles, called generically HSCPs.
HSCPs can be distinguished from Standard Model particles by exploiting their unique signature: very high momentum and low velocity. These features are a consequence of their high mass and the relatively limited LHC collision energy. Two experimental techniques are used to identify such hypothetical heavy and low-velocity particles: the measurement of the ionization energy loss rate using the all-silicon tracker detector and the time-of-flight measurement with the muon detectors.

UCL members have developed the ionization energy loss identification technique and have lead the CMS HSCP search since 2010, when the first HSCP paper became one of the first published LHC search papers. Updated results, using the 2011 dataset, were then published followed by a comprehensive paper including also searches for fractional and multiply-charged particles published using the full CMS Run-1 dataset. The results obtained by analysing the 2015 Run 2 data at 13 TeV have also been published.

The analysis, which is very inclusive, doesn't find evidence of HSCP. It currently excludes, among various models, the existence of quasi-stable gluinos, predicted by certain realizations of supersymmetry, and Drell-Yan-produced staus with masses lower than about 1.3 TeV and 350 GeV, respectively. These and the other limits set by the analysis are the most stringent to date. The CMS HSCP papers total to date more than 300 citations.

Search for non-resonant new physics in ttbar production

The lack of observed resonances produced at the LHC motivates finding new ways of searching for BSM phenomena. This project aims at discovering possible non-resonant New Physics affecting the production of Top quark pairs, by means of a dedicated analysis of data recorded by the CMS experiment. The New Physics effects are modeled using an effective field theory (EFT), whose parameters are to be measured or constrained in a global fit.

The analysis is conducted in close collaboration with phenomenologists to ensure the approach is theoretically sound and future-proof.

Search for nonresonant Higgs boson pair production in the llbb+MET final state

The discovery of a Higgs boson (H) by the ATLAS and CMS experiments fixes the value of the self-coupling λ in the scalar potential whose form is determined by the symmetries of the Standard Model and the requirement of renormalisability. Higgs boson pair production is sensitive to the self-coupling and will play a major role in investigating the scalar potential structure.

This project consists in a search for nonresonant Higgs boson pair production via gluon fusion in the final state with two leptons, two b jets and missing transvere energy – gg → H(bb) H(WW) asking for the leptonic decay of the W's. The analysis is conducted in close collaboration with phenomenologists to ensure the approach is theoretically sound and future-proof.

Search for resonant Higgs pair production in the llbb+MET final state

The recent discovery of a scalar boson compatible with the Standard Model (SM) Higgs boson opened new windows to look for physics beyond the SM (BSM). An example of newly accessible phenomenology is the production of resonances decaying into two SM Higgs bosons (h) predicted by several theory families such as additional Higgs singlet/doublet or warped extra dimension.

This project consists in a search for spin-0 or spin-2 resonances produced via gluon fusion in the final state with two leptons, two b-jets and missing transverse energy – gg → X → h(bb) h(WW) asking for the leptonic decay of the W's. In particular, we are probing a mass range between 260 GeV and 900 GeV.

Single top studies at LHC

The electroweak production cross section of single top quarks is an important measurement for LHC, being a potential window on "new physics" effects.
Past achievements of this group include the very first measurement at 7 TeV (in t channel) with 2010 data, followed by the most precise inclusive cross section measurements of t-channel cross section at 7, 8 and 13 TeV, and the first differential measurements at 13 TeV; the most precise |Vtb| extraction from single top in the world; the first measurement of W-helicity fractions in a single-top topology; the first observation of the tW production mode; the first measurement of single-top polarization in t channel; stringent limits on anomalous tWb, tgu, tgc couplings.

External collaborators: CMS collaboration.

Testing the sign of the coupling of the new H(125) boson to top quarks with the CMS data

During 2012, the CMS and ATLAS collaborations independently reported unambiguous evidence of the existence of a new particle of mass around 125 GeV.
Several analyses are ongoing to challenge the hypothesis that the new particle is the SM Higgs. We focus on the search for its production in association with a single top quark. Due to an effect of quantum interference, this process is strongly suppressed in the Standard Model while it gets enhanced if its couplings to the top quark and to the W boson have opposite sign. An observation of this production mode would therefore be a convincing proof that this new particle does not belong to the Standard Model.
We published the first search for this process using 8 TeV data, and we expect to achieve sensitivity to anomalous values of the top Yukawa phase during the LHC Run-II.

External collaborators: CMS collaboration.

Top quarks in Heavy Ion collisions and other non-standard LHC datasets

The top quark, being the heaviest known elementary particle, is a powerful tool to test QCD.
The study of top quark pair production in Heavy Ion collisions at the LHC, making use of the dedicated Pb-Pb and p-Pb runs, will open a new road in the investigation of the Quark-Gluon Plasma.
This research project started with the first measurement of top-pair cross section in pp collisions at 5.02 TeV, taking advantage of a "reference run" in Nov.2015 (CMS-TOP-16-015 and CMS-TOP-16-023). This measurement, in addition to be useful as a reference for measurements in Pb-Pb and p-Pb collisions at the same center-of-mass energy per nucleon, also provides a significant broadening of the lever arm for global PDF fits making use of top-quark data.
More recently we reported the first observation of top quark production in p-Pb collisions (arXiv:1709.07411 [nucl-ex]), using the data at 8.16 TeV taken in Nov.2016, testing the models of nuclear modification of the gluon PDF at high Bjorken-x.

External collaborators: David D'Enterria, Pedro Silva and Marta Verweij (CERN).

Past projects

Hide past projects.

Advanced Techniques for Fast Simulation and Data Analysis in High Energy Physics (ASAP)

The discovery of the 125GeV Higgs boson by the LHC experiments has finally opened a new era in the exploration of the TeV scale. The physics programs of CMS and ATLAS aim far beyond the simple discovery, and vigorously pursue the full characterization of the newly discovered state and the full exploration of the TeV scale in search of new phenomena. A key lesson drawn from first two years of LHC running is that most probably first discoveries and then identification of new states/interactions will not be easy. On the one hand, model-independent searches in simple topologies such as single/multi lepton at high transverse momenta have not shown any hint of new physics so far. On the other, topologies with jets and/or missing transverse energies, much more challenging experimentally, do strongly depend on the underlying theoretical models so that efficiently identifying signal enhanced regions of the phase space is quite involved. In this context, multi-variate techniques have become more and more central in the analysis of data from hadron collider experiments, to maximally exploit the information available on the signal and on the backgrounds. Amongst the most advanced techniques and certainly the most powerful one from the theoretical point of view, the so called matrix element method stands out. The main goal of this proposal is to advance the use and the scope of the matrix-element method so to significantly extend the range of physics applications at the LHC to the search of new physics. First we aim at providing the experimental HEP community with complete and automatic simulation tools, such as MadWeight/MoMEMta and Delphes, that overcome the technical limitations of the method. Second we propose to test and apply the new tools to current analyses in signatures that involve final state leptons and b-jets. Finally, we explore new and original applications of the method to both model-dependent or model-independent searches of new physics at the LHC.

External collaborators: CMS collaboration.

Early observation of top quark pairs in the dileptonic final state

The top quark is the heaviest elementary particle discovered so far, and many properties related to this quark are still to be understood.
Its observation and mass measurement at Tevatron highlighted the uncommon nature of this quark. The fact that its electroweak decay is faster than the hadronization time scale implies that the top quark exists only as a free quark, so that the effects from new physics should show up very clearly by comparing measurements with the precise Standard Model preditions.
Its "re-discovery" at LHC will be a major milestone for the experiments, since the complexity of the final state demands a fairly good knowledge of the experimental apparatus and a certain degree of control of the backgrounds. Its expected large coupling to Higgs bosons will also be relevaant for the searches for higgs sectors beyond the Standard Model.

External collaborators: CMS collaboration.

Measurement of the b(b)Z process at LHC

At LHC, the Z boson can be produced in association with one or two b-quarks, which is here refereed as b(b)Z production. This process has been seen for the first time at LHC, and measurement of it is an important test of QCD calculations.

For the first time, we observed the Z+b final state and measured of the Z+b/Z+j cross-section ratio in 35.9/pb of pp collisions at 7 TeV, using particle flow jets and simple secondary vertex b-tagging algorithm in the definition of the signal.Emphasis is put on kinematic properties of the jets. With more luminosity, we are working on the measurement of the cross-section for the b(b)Z process, with the identification of one or two b-jets.

External collaborators: A.Gilbert, A.-M.Magnan, A.Nikitenko (Imperial College London); N.Heracleous, A.Perieanu (RWTH Aachen); M.Musich, E.Migliore (University of Torino), and CMS Collaboration.

Precise luminosity measurement in CMS

Precise determination of the absolute luminosity is crucial for many measurements in CMS. The measurement of the exclusive two-photon production of muons pairs by CMS provides a powerful method to calibrate the integrated luminosity.

External collaborators: CMS forward physics analysis group, CMS luminosity group.

Radiative Kaon decays in NA62

ALthough the study of rare kaon radiative decays is not the main objective of NA62, both the detector and the beam are fully adapted to their study.

Among all radiative kaon decays, two channels are going to be studied in depth in order to see if NA62 could provide extra information:
Formula: 0 and Formula: 1. These channels can provide information about direct CP violation and QCD-QED interplay.

External collaborators: A. Ceccucci (CERN).

Search for baryon number violation in events with top quarks

A search for a yet-unobserved baryon number violating top quark decay has been performed using data collected in 2011 and 2012 by the CMS experiment at the LHC. This search was motivated by a theoretical work from the UCL-CP3 phenomenology group, who have noticed that the existence of physics beyond the standard model would imply, under certain conditions, baryon number violation both in the production of top quarks and in their decay process. In the latter case top quarks would decay with a certain branching fraction into a lepton and two jets. The CP3 Louvain experimental group has searched for such decays in a final state containing a pair of top quarks, where the second top quark experiences a SM hadronic decay. No evidence of such an exotic decay has been found and limits have been set at the level of per mille on the branching fraction of the top quark.
More recently, the CP3 Louvain group has been preparing a new search for boosted same sign top quark pairs, possibly accompanied by additional ligh-flavor jets. This is also a signature of baryon number violation. Notable models where such topologies can be realized are supersymmetric ones with R-parity violation.

Search for Higgs boson(s) in CMS at the LHC in the llbb+MET topology

Search for Higgs boson(s) within the Standard Model and beyond and also withing a minimal extension of the scalar sector (2HDM).

The final state under study is a lepton pair associated with two b-jets and missing transverse energy. This topology is sensitive to a light SM Higgs via the H(bb)H(WW) production (via loop or Higgs self-coupling diagrams) and via the associated production of ttbar pairs and invisible particles. Requiring additional b jets (thus defining the llbbbb+MET final state) allows also the very interesting studies of a standard model Higgs produced in association with a top quark pair and It is also sensitive to the production of non standard heavy Higgs bosons decaying into ZA or WA, in the WAWA and ZAZA channels.

In particular, we are studying both resonant and non-resonant Higgs-pair production.

External collaborators: CMS collaboration.

Search for new high-mass resonances decaying into di-muons with the CMS detector at the LHC

The CMS experiment is used to study the di-muon invariant mass spectrum. These spectra allow searches for high-mass unstable particles (resonances) to be performed in a yet unexplored high mass range.

High-mass resonances decaying into muon pairs are predicted in a number of models beyond the Standard Model of the fundamental interactions. Notable examples are heavy neutral gauge bosons predicted by grand unification theories, as well as gravitons arising in the Randall-Sundrum model of extra dimensions.

The first search for high mass resonances was published in JHEP by CMS using the data acquired in 2010. Updated results were produced using part of the 2011 dataset in Summer 2011. By combining di-electron and di-muon data, CMS excluded the existence of resonances predicted by a number of theoretical models with masses below about 2 TeV. These limits are the most stringent to date.
The UCL CP3 group contributed to these two early CMS publications by being one of the three teams of the CMS Collaboration that regularly analyzed new data, optimising the muon isolation criteria and conducting a full study of a mild excess observed in the low-mass region (at ~120 GeV) in both the di-electron and the di-muon channels.

Since 2012 the activity of the UCL-CP3 group is limited to the exploration of a matrix-element approach to this search. Preliminary results show that the exploitation of the full kinematical information of the di-muon events can give some sizable improvements over the classical one that uses just the di-muon invariant mass. In addition, the group develops a new algorithm for measuring the energy of TeV-muons (for details, please read the dedicated project). This algorithm is expected to bring improvements in both the di-muon and single muon+missing energy searches starting from 2014.

Test of Lepton Flavour Universality in Kaon Decays

A precision test of lepton flavour universality can be performed by measuring the ratio RK of kaon leptonic decay rates Formula: 0 and Formula: 1. Any deviation of the expected Standard Model prediction will be a hint of New Physics. This measurement has been performed at one percent level with the NA62 data taken in 2007 and 2008 Formula: 2 in complete agreement with the Standard Model expectation. A prospective analysis for the improvement of this measurement with the full NA62 apparatus is underway.

External collaborators: Augusto Ceccucci (CERN), Cristina Lazzeroni (Birmingham).

Triggers for top quark physics

Our group is involved in the trigger design and maintenance for the LHC Run II in order to select the most interesting collision events for topologies with a lepton and a b quark with the CMS detector. Given the final state, this trigger is of particular interest for top quark physics, but it is also relevant to many other analyses (including the single top plus Higgs search ongoing in our group). Studies are carried out to implement the latest CMS developments in physics object definitions into the trigger path as well as to optimize the selections for the best efficiency and the rate possible. Our group is responsible for the b-tagging part together with organizing the whole activities within the CMS top quark group. Andrey Popov is official contact person between the Top Quark group and the Trigger group.

External collaborators: CMS TOP PAG, CMS TSG.

Validation of a fully automatic matrix element technique for CMS data analyses

The matrix element reweighting method attempts to compute the full likelihood of an observed event given a theoretical model. The method therefore measures the degree of compatibility of the event with the given model using as much information as available. MadWeight is a tool that fully automatize the computation of the event likelihood for any model implemented in MadGraph, by performing phase-space integration and providing a framework for taking into account the experimental resolution on the observed final state objects.
This project aims at validating the matrix element reweighting technique implemented in MadWeight on a number of benchmark searches. In some cases, the final goal is the efficient identification of background events. The final states that are being considered are: Zbb, single top, ttbar resonances and dimuon resonances.

Publications

2017

Working Group 5: Physics with Heavy Flavours
Giammanco, Andrea and Gauld, Rhorry and Pearce, Alex
[Abstract] [PDF] Proceedings of the 25th International Workshop on Deep Inelastic Scattering and Related Topics (DIS 2017), 3-7 April 2017, University of Birmingham, UK
Contribution to proceedings. 12th October.
Observation of top quark production in proton-nucleus collisions
CMS Collaboration
[Abstract] [PDF] Submitted to Physics Review Letters
Refereed paper. 22nd September.
Search for resonant production of two Higgs bosons in the b-blν lν final state in 2016 data
O. Bondu, S. Brochet, C. Delaere, M. Delcourt, B. Francois, V. Lemaitre, M. Vidal Marono, S. Wertz
[Full text] CMS AN-2016/444; Restricted access
Private experimental note. 21st August.
Search for production of two Higgs bosons in the b-blν lν final state in 2016 data
O. Bondu, S. Brochet, C. Delaere, M. Delcourt, B. François, V. Lemaître, M. Vidal Marono, S. Wertz
[Full text] Restricted access; CMS AN-2016/430
Private experimental note. 21st August.
Search for resonant and nonresonant Higgs boson pair production in the bblnulnu final state in proton-proton collisions at sqrt(s) = 13 TeV
CMS collaboration
[Abstract] [PDF] [Full text] Submitted to JHEP.
Refereed paper. 21st August.
Object definitions for top quark analyses at the particle level
CMS Collaboration
[Full text] CERN-CMS-NOTE-2017-004
Public experimental note. 6th June.
Inclusive tt cross section at sqrt(s)=5.02 TeV using final states with at least one charged lepton
CMS collaboration
[Full text] CMS Physics Analysis Note TOP-16-023, presented at the 25th edition of DIS, Birmingham
4th April.
Search for light bosons in decays of the 125 GeV Higgs boson in proton-proton collisions at sqrt(s) = 8 TeV
Khachatryan, Vardan and others
[Abstract] [PDF]
Refereed paper. 10th January.

2016

Search for electroweak production of charginos in final states with two tau leptons in pp collisions at sqrt(s) = 8 TeV
CMS Collaboration
[Abstract] [PDF] [Journal] Submitted to JHEP
Report number: CMS-SUS-14-022, CERN-EP-2016-225

Refereed paper. 1st December.
Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
Khachatryan, Vardan and others
[Abstract] [PDF] [Journal]
Refereed paper. 6th October.
Search for long-lived charged particles in proton-proton collisions at sqrt(s) = 13 TeV
Khachatryan, Vardan and others
[Abstract] [PDF] [Journal] Submitted to Phys. Rev. D
6th October.
Cross section measurement of $t$-channel single top quark production in pp collisions at $sqrt s =$ 13 TeV
Sirunyan, Albert M and others
[Abstract] [PDF] [Journal] Most precise measurement of the single-top cross section at 13 TeV.
Refereed paper. Public experimental note. 4th October.
First measurement of the top quark pair production cross section in proton-proton collisions at sqrt(s)=5.02 TeV
CMS collaboration
[Full text] CMS Physics Analysis Note TOP-16-015, presented at LHCP2016
Public experimental note. 16th June.
Combination of cross-section measurements of associated production of a single top quark and a W boson at sqrt(s)=8 TeV with the ATLAS and CMS experiments
ATLAS and CMS collaborations
[Full text] ATLAS-CONF-2016-023 and CMS-PAS-TOP-15-019 (double reference, as it is a joint note)
Public experimental note. 24th May.
Search for H(WW)H(bb) decays using the 2015 data sample
CMS collaboration
[Full text] prepared for Moriond 2016
Public experimental note. 28th April.
Search for A/H to Z(ll)+H/A(bb) with 2015 data
CMS collaboration
[Full text] Prepared for Moriond 2016
Public experimental note. 28th April.
Search for Neutral Resonances Decaying into a Z Boson and a Pair of b Jets or Tau Leptons
CMS collaboration
[Abstract] [PDF] [Journal] [Full text] Published in Phys. Lett. B 759 (2016) 369
Refereed paper. 28th April.
Measurement of the differential cross section for t-channel single-top-quark production at sqrt(s)=13 TeV
CMS Collaboration
[Full text] CMS Physics Analysis Summary CMS-TOP-16-004
Public experimental note. 27th April.
Summary results of high mass BSM Higgs searches using CMS run-I data
CMS Collaboration
[Full text] CMS Physics Analysis Summary CMS-PAS-HIG-16-007,
Public experimental note. 22nd April.
Search for a heavy scalar boson decaying into a pair of Z bosons in the 2ℓ2ν final state
CMS Collaboration
[Full text] CMS Physics Analysis Summary CMS-PAS-HIG-16-001
Public experimental note. 22nd April.
Searches for Long-lived Charged Particles in Proton-Proton Collisions at √s = 13 TeV
CMS Collaboration
[Full text] CMS Physics Analysis Summary CMS-PAS-EXO-15-010
Public experimental note. 22nd April.
Evidence for exclusive gamma-gamma to W+ W- production and constraints on anomalous quartic gauge couplings at sqrt(s) = 7 and 8 TeV
Khachatryan, Vardan and others
[Abstract] [PDF] [Journal] Submitted to JHEP
Refereed paper. 19th April.
Measurement of the inclusive cross section of single top-quark production in the t-channel at 13 TeV
CMS collaboration
[Full text]
Public experimental note. 25th March.
A Theory of Ambulance Chasing
Backović, Mihailo
[Abstract] [PDF]
Refereed paper. 3rd March.
Search for exotic decays of the Higgs boson to a pair of new light bosons with two muon and two b jets in final states
CMS Collaboration
[Full text]
Public experimental note. 3rd March.

2015

Search for H/A decaying into Z and A/H, with Z-->ll and A/H-->bb or A/H-->tau tau
CMS Collaboration
[Full text] CMS-PAS-HIG-15-001
Public experimental note. 1st December.
Single top quark production at the LHC
Andrea Giammanco
[Abstract] [PDF] [Journal] [Full text] Published in Reviews in Physics Vol. 1, no.1, p. 1 (January 2016)
Refereed paper. 23rd November.
Measurement of top quark polarisation in t-channel single top quark production
Khachatryan, Vardan and others
[Abstract] [PDF] [Journal] JHEP 04 (2016) 073
Refereed paper. 9th November.
Higgs pair production at the High Luminosity LHC
CMS collaboration
[Full text] CMS-PAS-FTR-15-002
Public experimental note. 29th October.
Measurement of the top quark pair production cross section in proton-proton collisions at $sqrt(s) =$ 13 TeV
Khachatryan, Vardan and others
[Abstract] [PDF] [Journal] Phys. Rev. Lett. 116 (2016) 052002
Refereed paper. 20th October.
Evidence for exclusive gamma-gamma to W+ W- production and constraints on Anomalous Quartic Gauge Couplings at sqrt-s = 8 TeV
CMS collaboration
[Full text]
Public experimental note. 3rd October.
Search for the associated production of a Higgs boson with a single top quark in proton-proton collisions at $ sqrt{s}=8 $ TeV
Khachatryan, Vardan and others
[Abstract] [PDF] [Journal]
Refereed paper. 29th September.
Measurement of the t-channel single top-quark cross section at 13 TeV
CMS collaboration
[Full text] Physics Analysis Summary TOP-15-004
Public experimental note. 14th September.
First measurement of the differential cross section for ttbar production in the dilepton final state at sqrt(s) = 13 TeV
CMS collaboration
[Full text] Physics Analysis Summary CMS-TOP-15-010
Public experimental note. 1st September.
Measurement of the top quark pair production cross section in proton-proton collisions at sqrt(s) = 13 TeV with the CMS detector
CMS collaboration
[Full text] Physics Analysis Summary CMS-TOP-15-003
Public experimental note. 1st September.
First look at top-quark selections with 13 TeV data
CMS collaboration
[Full text] CMS Detector Performance Note released in occasion of the EPS-HEP 2015 conference
Public experimental note. 24th July.
Constraints on the pMSSM, AMSB model and on other models from the search for long-lived charged particles in proton-proton collisions at sqrt(s) = 8 TeV
Khachatryan, Vardan and others
[Abstract] [PDF] [Journal]
Refereed paper. 10th February.

2014

Measurement of Top-Quark Polarization in t-channel Single-Top Production
Matthias Komm on behalf of the CMS collaboration
[Abstract] [PDF] CMS CR-2014/430, 7th International Workshop on Top Quark Physics 2014 proceedings
Contribution to proceedings. 1st December.
Study of HH production with H → bb, H → WW → lν lν for an upgraded CMS detector at the HL-LHC
C. Delaere, B. Francois, V. Lemaitre, A. Mertens, M. Vidal Marono
[Full text] CMS AN-2014/141
Private experimental note. 1st December.
Search for a non-standard-model Higgs boson decaying to a pair of new light bosons with two muon and two b jets in final states
Abideh Jafari and Andrea Giammanco
[Full text]
Private experimental note. 30th November.
Single top measurements and the |V_tb| extraction at the LHC
Abideh Jafari on behalf of the CMS and ATLAS collaborations
[Abstract] [PDF] To be appeared in the proceeding of the TOP2014 conference.
Contribution to proceedings. 30th November.
Identification of signal events in a search for H->bb produced in association with single top quarks
Andrey Popov on behalf of the CMS collaboration
[Abstract] [PDF] To appear in proceedings of TOP2014
Contribution to proceedings. 28th November.
Measurements of single top-quark production in pp collisions by the CMS experiment
Andrey Popov on behalf of the CMS collaboration
[Abstract] [PDF] To appear in proceedings of CKM2014
Contribution to proceedings. 28th November.
Generic search for a Two Higgs Doublet Model in the Z(ll)+bb final state
R. Castello, A. Caudron, C. Delaere, T.A. du Pree, A. Mertens
[Full text] CMS AN-2014/029
Restricted access (CMS internal analysis note)

Private experimental note. 24th November.
Measurement of the W boson helicity in events with a single reconstructed top quark in pp collisions at sqrt(s) = 8 TeV
Khachatryan, Vardan and others
[Abstract] [PDF] [Journal] [Full text] JHEP 01 (2015) 053
Refereed paper. 7th October.
Search for $H\to b\bar b$ in association with single top quarks as a test of Higgs couplings
CMS Collaboration
[Full text] CMS Physics Analysis Summary HIG-14-015
Public experimental note. 30th September.
Alignment and calibration of CMS detector during collisions at LHC
Roberto Castello on behalf of CMS collaboration
[Full text]
Contribution to proceedings. 4th July.
Reinterpreting the results of the search for long-lived charged particles in the pMSSM and other BSM scenarios
CMS Collaboration
[Full text]
Public experimental note. 1st July.
Projected Performance of an Upgraded CMS Detector at the LHC and HL-LHC: Contribution to the Snowmass Process
CMS Collaboration
[Abstract] [PDF]
Public experimental note. 1st July.
Search for invisible decays of a Higgs produced in association with a Z boson
CMS Collaboration
[Full text]
Public experimental note. 1st July.
Search for a heavy Higgs boson in the H -> ZZ -> 2l 2nu channel in pp collisions at sqrt(s) = 7 and 8 TeV
CMS Collaboration
[Full text]
Public experimental note. 1st July.
Measurement of electroweak production of two jets in association with a Z boson in proton-proton collisions at sqrt(s)=8 TeV
CMS Collaboration
[Full text]
Public experimental note. 1st July.
Search for baryon number violation in top-quark decays
CMS Collaboration
[Abstract] [PDF] [Journal]
Refereed paper. 1st July.
Evidence for the 125 GeV Higgs boson decaying to a pair of tau leptons
CMS Collaboration
[Abstract] [PDF] [Journal]
Refereed paper. 1st July.
Evidence for the direct decay of the 125 GeV Higgs boson to fermions
Chatrchyan, Serguei and others
[Abstract] [PDF] [Journal] Subjects: High Energy Physics - Experiment (hep-ex)
Journal reference: Nature Physics 10 (2014) 557
DOI: 10.1038/nphys3005
Report number: CMS-HIG-13-033, CERN-PH-EP-2014-004

Refereed paper. 1st July.
Future prospects of Higgs Physics at CMS
Marono, Miguel Vidal
[Abstract] [PDF] [Full text] Proceedings of the Conference Large Hadron Collider Physics (LHCP)
Contribution to proceedings. 19th June.
The observation of a Higgs boson in the bosonic decay channels and determination of its properties with the CMS experiment
Miguel Vidal Maroño
[Full text] Proceedings of the Conference Lake Louise Winter Institute 2014
Contribution to proceedings. 19th June.
Higgs physics at CMS
Miguel Vidal Maroño
[Full text] Proceedings of the International Conference on new Frontiers in Physics
Contribution to proceedings. 19th June.
Analysis of t-channel single top-quark production with Bayesian neural networks in CMS experiment at sqrt(s) = 7 TeV with L = 5/fb
E. Boos, V. Bunichev, L. Dudko, N. Tsirova, A. Markina, M. Perfilov, A. Popov, I. Myagkov, I. Shvetsov, G. Vorotnikov, S. Bitioukov, D. Konstantinov, A. Giammanco, J. Hansen, J. Komaragiri, D. Martschei, Th. Muller, J. Ott, T. Peiffer, S. Rocker, J. Wagner-Kuhr, A. O. M. Iorio, M. Merola, L. Lista, A. Jafari
[Full text] Analysis Note AN-2012/291 in support of CMS-TOP-14-007
Private experimental note. 12th June.
Exclusive processes in pp collisions in CMS
da Silveira, Gustavo G.
[Abstract] [PDF] 7 pages, 6 figures, presented at the XXI International Workshop on Deep-Inelastic Scattering and Related Subjects, April 2013, Marseille, France
Contribution to proceedings. 11th June.
Exclusive production of $W$ pairs in CMS
da Silveira, Gustavo G.
[Abstract] [PDF] 8 pages, 10 figures, 1 table, Proceedings of the 2nd International Conference on New Frontiers in Physics, Kolymbari, Crete, Greece, Aug. 28th -- Sept. 5th, 2013
Contribution to proceedings. 11th June.
Search for anomalous Wtb couplings and top FCNC in t-channel single-top-quark events
CMS Collaboration
[Full text] CMS-PAS-TOP-14-007
Public experimental note. 9th June.
Measurements of top-quark properties at the LHC
Andrea Giammanco
Conference Report CMS CR-2013/259.
Contribution to proceedings. 9th June.
Update to the measurement of top quark polarization in t-channel single-top production
T. Chwalek, A. Giammanco, M. Kadastik, M. Komm, D. Konstantinov, J. Pata, S. Rocker, A. Tiko, F. Roscher, J. Wagner-Kuhr
Analysis Note AN-2014/001 in support of the paper for CMS-TOP-13-001. Update of AN-2012-448.
Private experimental note. 9th June.
Measurements of the top-quark properties at CMS
Abideh Jafari for the CMS Collaboration
[Journal] [Full text] Proceedings of the Conference LHCP2013
Contribution to proceedings. 7th June.
W-helicity measurement in single-top event topology with lepton+jets final states using 19.7 fb^{-1} of LHC data collected by CMS at sqrt(s)=8 TeV
A. Jafari, A. O. Iorio, J. D'Hondt, J. Wagner Kuhr, L. Lista, R. Gonzalez Suarez, A. Giammanco
[Full text] CMS internal document supporting TOP-12-020 paper draft
Private experimental note. 7th June.
Search for H->bb in association with single top quarks as a test of Higgs boson couplings
A. Anuar, A. Bean, K. Bloom, C. Boeser, T. Chwalek, S. Fink, A. Giammanco, R. Gonzalez Suarez, D. Knowlton, J. Komaragiri, M. Komm, B. Maier, D. Noonan, A. Popov, J. Wagner-Kuhr
[Full text] Analysis Note AN-2013/113 in support of CMS-HIG-14-015
Private experimental note. 7th June.
Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at $sqrt{s}$ = 7 TeV
Chatrchyan, Serguei and others
[Abstract] [PDF] [Journal] [Full text] Published in JHEP 1406 (2014) 120
Refereed paper. 10th February.
Observation of the associated production of a single top quark and a $W$ boson in $pp$ collisions at $sqrt s = $8 TeV
Chatrchyan, Serguei and others
[Abstract] [PDF] [Journal] Phys. Rev. Lett. 112 (2014) 231802
Refereed paper. 18th January.
Exclusive processes in proton-proton collisions with the CMS experiment at the LHC
Forthomme, Laurent
[Abstract] [PDF] Proceedings of the Low x workshop, May 30 - June 4 2013, Rehovot and Eilat, Israel
Contribution to proceedings. 8th January.

2013

Measurement of top quark polarization in t-channel single-top production
T. Chwalek, A. Giammanco, A. O. M. Iorio, M. Kadastik, M. Komm, D. Konstantinov, J. Pata, M. Piibeleht, A. Popov, L. Rebane, A. Remm, S. Roecker, A. Tiko, F. Roscher, J. Wagner-Kuhr
[Full text] Supporting note for CMS-TOP-13-001
Private experimental note. 23rd September.
Measurement of top quark polarization in t-channel single-top production
CMS Collaboration
[Full text] Physics Analysis Summary
Public experimental note. 23rd September.
Performance of b tagging at sqrt(s)=8 TeV in multijet, ttbar and boosted topology events
The CMS Collaboration
[Full text]
Public experimental note. 26th August.
Matrix Element method applied for ttbar estimation in Z(ll)bb analysis.
A. Pin V. Lemaitre C. Beluffi J. Vizan
[Full text] Supporting document for SMP-13-004
Private experimental note. 26th August.
Measurement of the Z+b-jets cross section in pp collisions at sqrt(s) = 7 TeV with the CMS detector
Tristan du Pree (for the CMS Collaboration)
[Full text] Proceedings for Moriond 2012
Contribution to proceedings. 26th August.
Measurement of the production cross sections of a Z boson in association with b jets in pp collisions at sqrt(s) = 7 TeV
The CMS Collaboration
[Full text] First presented at DIS 2013
Public experimental note. 26th August.
Measurement of the cross section of the production of a Z boson in association with 1, 2, or more b jets at CMS in pp collisions at sqrt(s)=7 TeV.
Tristan du Pree, Roberto Castello, Ludivine Ceard, Anne-Marie Magnan, Andrew Gilbert, Christophe Delaere, Adrien Caudron, Jerome de Favereau
[Full text] CMS internal document supporting CMS-SMP-13-004
Private experimental note. 26th August.
Implementation and training of the MVA b-tagging algorithms in CMSSW
A. Descroix, T. du Pree, P. Van Mulders, G. Van Onsem, J. Vizan
[Full text] CMS internal document supporting CMS-BTV-13-001
Private experimental note. 26th August.
Combination of b-tagging efficiency measurements in 2012 data at 8 TeV pp collision
Wolfgang Adam, J\'er\'emy Andrea, Camille Beluffi, Daniel Bloch, Adrien Caudron, Harry Cheung, Caroline Collard, Thomas Danielson, Alexis Descroix, Tristan du Pree, Juan Pablo Fernandez Ramos, Cristina Ferro, Alex Garabedian, Pablo Goldenzweig, Juan Pablo Gomez Cardona, Rebekka Hoing, Ketino Kaadze, James Keaveney, Dan Knowlton, Patricia Lobelle Pardo, Michael Maes, Sudhir Malik, Ivan Marchesini, Ernesto Migliore, Niklas Mohr, Marco Musich, Meenakshi Narain, Andrea Rizzi, Alexander Schmidt, Luca Scodellaro, Michael Segala, Pedro Silva, Thomas Speer, Alberto Traverso, Pierre Van Hove, Petra Van Mulders, Gerrit Van Onsem, Caterina Vernieri, Jesus Vizan, Roberval Walsh, Jinzhong Zhang
[Full text]
Private experimental note. 26th August.
Search for Z(ll)H(bb) using Matrix Element method
A.Pin, T. du Pree, R. Castello, J. Vizan C. Beluffi, A. Caudron, C. Delaere, V. Lemaitre
[Full text] Internal CMS analysis note
Private experimental note. 26th August.
Results on b-tagging identification in 8 TeV pp collisions
The CMS Collaboration
[Abstract] [PDF] [Journal]
Refereed paper. Public experimental note. 26th August.
Vector boson + jets measurements at CMS
Tristan du Pree (for the CMS Collaboration)
[Full text] Proceedings for DIS 2013
Contribution to proceedings. 26th August.
Combination of b-tagging efficiency measurements for the 22Jan2013 Rereco of 2012 data at 8 TeV pp collision
Wolfgang Adam, J\'er\'emy Andrea, Camille Beluffi, Daniel Bloch, Adrien Caudron, Harry Cheung, Caroline Collard, Thomas Danielson, Alexis Descroix, Tristan du Pree, Alberto Escalante, Dinko Ferencek, Juan Pablo Fernandez Ramos, Cristina Ferro, Alex Garabedian, Pablo Goldenzweig, Juan Pablo Gomez Cardona, Rebekka Hoing, Ketino Kaadze, James Keaveney, Dan Knowlton, Patricia Lobelle Pardo, Michael Maes, Sudhir Malik, Ivan Marchesini, Ernesto Migliore, Niklas Mohr, Marco Musich, Meenakshi Narain, Andrea Rizzi, Alexander Schmidt, Luca Scodellaro, Michael Segala, Pedro Silva, Thomas Speer, Alberto Traverso, Pierre Van Hove, Petra Van Mulders, Gerrit Van Onsem, Caterina Vernieri, Jesus Vizan, Roberval Walsh, Jinzhong Zhang
[Full text] CMS internal document supporting CMS-BTV-13-001
Private experimental note. 26th August.
Study of exclusive two-photon production of $W^+W^-$ in pp collisions at $sqrt{s}$ = 7 TeV and constraints on anomalous quartic gauge couplings
CMS Collaboration
[Abstract] [PDF] [Journal] [Full text 1] [Full text 2] Published in JHEP 07 (2013) 116 [FSQ-12-010]
Refereed paper. 31st May.
Searches for long-lived charged particles in pp collisions at sqrt(s)=7 and 8 TeV
CMS Collaboration
[Abstract] [PDF] [Journal] submitted to JHEP
Refereed paper. 6th May.
Search for the standard model Higgs boson decaying to tau pairs produced in association with a W or Z boson with the CMS experiment in pp collisions at \sqrt{s} = 7 and 8 TeV
CMS Collaboration
[Full text] CMS Physics Analysis Summary, CMS-PAS-HIG-12-053
Public experimental note. 6th May.
Search for the standard model Higgs boson decaying to tau pairs produced in association with a W or Z boson
CMS Collaboration
[Full text] CMS Physics Analysis Summary, CMS-PAS-HIG-12-051
Public experimental note. 6th May.
Search for baryon number violating top quark decays in pp collisions at \sqrt{s} = 7 TeV
CMS Collaboration
[Full text] CMS Physics Analysis Summary, CMS-PAS-B2G-12-002
Public experimental note. 6th May.
Measurement of W-helicity fractions in single top events topology
CMS Collaboration
[Full text] CMS-TOP-12-020
Public experimental note. 7th March.
Single Top as Window on Heavy Quarks and Other New Physics
Andrea Giammanco
[Full text] Advances in High Energy Physics
Volume 2013 (2013), Article ID 848491, 8 pages

Refereed paper. 14th February.

2012

Evidence for a particle produced in association with weak bosons and decaying to a bottom-antibottom quark pair in Higgs boson searches at the Tevatron
The CDF Collaboration
[Abstract] [PDF] [Journal]
16th December.
Introduction to HOBIT, a b-Jet Identification Tagger at the CDF Experiment Optimized for Light Higgs Boson Searches
J. Freeman, T. Junk, M. Kirby, Y. Oksuzian, T. J. Phillips, F. D. Snider, M. Trovato, J. Vizan, W. M. Yao
[Abstract] [PDF] [Journal] Published in Nuclear Instruments and Methods in Physics Research A 697
Refereed paper. 11th December.
Search for the standard model Higgs boson decaying to a bb pair in events with one charged lepton and large missing transverse energy using the full CDF data set
The CDF Collaboration
[Abstract] [PDF] [Journal] Published in Phys. Rev. Lett. 109, 111804 (2012)
6th December.
Combined search for the standard model Higgs boson decaying to a bb pair using the full CDF data set
The CDF Collaboration
[Abstract] [PDF] [Journal] Published in Phys. Rev. Lett. 109, 111802 (2012).
Refereed paper. 6th December.
Fast Simulation of the CMS Detector at the LHC
Rahmat Rahmat and Andrea Giammanco
[Full text] Presented at CHEP 2012: International Conference on Computing in High Energy and Nuclear Physics
Contribution to proceedings. 28th September.
Measurement of the single-top t-channel cross section in pp collisions at centre-of-mass energy of 8 TeV
CMS Collaboration
[Full text]
Public experimental note. 28th September.
Measurement of the single-top-quark t-channel cross section in pp collisions at sqrt(s) = 7 TeV
CMS Collaboration
[Abstract] [PDF] [Journal]
Refereed paper. 28th September.
Evidence for associated production of a single top quark and W boson in pp collisions at 7 TeV
CMS Collaboration
[Abstract] [PDF] [Journal] Submitted to PRL
Refereed paper. 28th September.
Measurement of the Z/gamma* + bb-jets cross section in pp collisions at sqrt(s) = 7 TeV with the CMS detector
The CMS Collaboration
[Full text] First presented at Moriond 2012
Public experimental note. 23rd May.
Measurement of the Z(ll)+bb cross section at CMS
R. Castello, L. Ceard, C. Delaere, A. Pin, and T.A. du Pree
[Full text] CMS internal document supporting CMS-SMP-12-003
Private experimental note. 23rd May.
Measurement of the Z/gamma*+b-jet cross section in pp collisions at 7 TeV
Chatrchyan, SergueiProg. Part. Nucl. Phys. and others
[Abstract] [PDF] [Journal] [Full text] Published in the Journal of High Energy Physics
Refereed paper. 10th April.
Contemporary measurements of the CKM matrix in the Kaon laboratory: current status and perspectives
S. Podolsky, E. Cortina, N. Lurkin
[Full text] Proceedings of the 13th Small Triangle Meeting — Stará Lesná, Nov. 13–16, 2011
Contribution to proceedings. 5th April.
Observation of Z+b
The CMS Collaboration
[Full text] Presented first at Moriond 2011
Public experimental note. 9th February.
Leptons efficiency and jets selection for the measurement of Z+b-jet (Z->ll) cross section
R. Castello, L. Ceard, C. Delaere, T.A. Du Pree, A. Gilbert, N.Heracleous, A.M. Magnan
[Full text] Restricted access: CMS internal document supporting CMS paper EWK-11-012
Private experimental note. 9th February.
Aspects of the Z+b cross-section measurement related to b-jet reconstruction
R. Castello, L. Ceard, C. Delaere, T.A. du Pree, A. Gilbert, J. Hauk, N. Heracleous, A.-M. Magnan, E. Migliore, M. Musich, and A. Nikitenko
[Full text] Restricted access: CMS internal document supporting CMS paper EWK-11-012
Private experimental note. 9th February.
Observation of the Z+b final state and measurement of the Z+b/Z+j cross-section ratio in pp collisions at 7 TeV
Tristan du Pree, Ludivine Ceard, Jerome de Favereau, Christophe Delaere
[Full text] Restricted access: CMS internal document supporting CMS PAS-EWK-10-015
Private experimental note. 9th February.
Top quark physics prospects with 10 fb^{-1} at 7 TeV
Giammanco, Andrea
[Abstract] [PDF] Proceedings of the Workshop TOP2011: 4th International Workshop on Top Quark Physics, Sant Feliu de Guixols, Spain, September 25 - 30, 2011
Contribution to proceedings. 24th January.

2011

Search for single top tW associated production in the dilepton decay channel in pp collisions at sqrt(s)=7 TeV
CMS collaboration
[Full text] Physics Analysis Summary TOP-11-022
Public experimental note. 28th September.
Measurement of the exclusive two-photon production of muon pairs at the LHC
The CMS Collaboration
[Full text]
Public experimental note. 30th June.
Measurement of the t-channel single top quark production cross section in pp collisions at sqrt(s) = 7 TeV
Chatrchyan, Serguei and others
[Abstract] [PDF] [Journal] Published in Phys. Rev. Lett. 107 (2011) 091802
Refereed paper. 16th June.
Observation of Z+b, Z -> ee, mumu with CMS at sqrt(s)=7TeV.
The CMS Collaboration
[Full text] Prepared for 2010 Winter Conferences (Moriond)
Public experimental note. 11th March.
Observation of the Z+b final state and measurement of the Z+b/Z+j cross-section ratio in pp collisions at 7 TeV
L. Ceard, J. de Favereau, C. Delaere and T. du Pree
[Full text] CMS analysis note, in relation to EWK-10-015
Private experimental note. 11th March.
Search for High-Mass Resonances Decaying to Muon Pairs with 40 pb-1 of Collisions Gathered at sqrt(s) = 7 TeV
S. Basegmez, G. Bruno, D. Pagano et al.
[Full text]
Private experimental note. 9th February.
Search for Resonances in the Dilepton Mass Distribution in pp Collisions at sqrt(s) = 7 TeV
The CMS Collaboration
[Abstract] [PDF] [Journal] [Full text] Submitted to JHEP
Refereed paper. 8th February.
Search for Heavy Stable Charged Particles in pp collisions at sqrt(s) = 7 TeV
The CMS Collaboration
[Abstract] [PDF] [Journal] Published in JHEP
Refereed paper. 8th February.
Test of Lepton Flavour Universality in K+ → l+ν Decays
CERN NA62 collaboration: C. Lazzeroni et al.
[Abstract] [PDF] [Journal] Submitted to Physics Letters B.
Refereed paper. 27th January.

2010

Expectations for observation of top-quark pair production in the dileptonic final state in early CMS data at √s=10 TeV
J. Caudron for the CMS Collaboration
[Journal] [Full text] Proceedings of TOP2010: 3rd International Workshop on Top Quark Physics
Contribution to proceedings. 31st December.
Latest results from the CMS experiment
A. Giammanco
[Journal] [Full text] CERN-CMS-CR-2010/175. J. Phys.: Conf. Ser. {\bf 259} (2010) 012056. In: PASCOS2010: 16th International Symposium on Particles Strings and Cosmology, 19-23 Jul 2010, IFIC Valencia, Valencia (Spain).
Contribution to proceedings. 31st December.
Particle identification by ionization energy loss in the CMS Silicon Strip Tracker
A. Giammanco
[Full text] CERN-CMS-CR-2010/177. In: JET2010: Jets in proton-proton and heavy-ion collisions, 12-14 Aug 2010, Czech Technical University, Prague (Czech Republic).
Contribution to proceedings. 31st December.
Measurement of the ttbar cross section in the dileptonic channels with track-jets at 7 TeV
J. Caudron, A. Giammanco, A. Pin, V. Lemaitre
[Full text] Analysis Note 2010/195
Private experimental note. 31st December.
First Measurement of the Cross Section for Top-Quark Pair Production in Proton-Proton Collisions at sqrt(s)=7 TeV
CMS collaboration
[Abstract] [PDF] [Journal] Published in Physics Letters B
Refereed paper. 31st December.
Selection of Top-Like Events in the Dilepton and Lepton-plus-Jets Channels in Early 7 TeV Data
CMS collaboration
[Full text] CMS Physics Analysis Summary
Public experimental note. 31st December.
Commissioning of Track-Jets with 900 GeV and 2360 GeV data
P. Azzurri, J. Caudron, D. Dobur, A. Hinzmann, T. Klimkovich, S. Lowette
[Full text] CMS Analysis Note
Private experimental note. 29th July.
Track-Jets Results with √s=7 TeV pp Collisions
J. Caudron, A. Giammanco, A. Hinzmann, T. Klimkovich, P. Azzurri, S. Lowette, D. Dobur
[Full text] CMS Analysis Note
Private experimental note. 29th July.
Commissioning of TrackJets in pp Collisions at $\sqrt{s} =$ 7 TeV
The CMS Collaboration
[Full text] CMS Physics Analysis Summary
Public experimental note. 29th July.
Exclusive production at the LHC
Nicolas Schul for the CMS Collaboration
[Full text] Proceedings of DIS2010: XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects
Contribution to proceedings. 1st July.
TCT and test beam results of irradiated magnetic Czochralski silicon (MCz-Si) detectors
Luukka, P. and others
[Journal] Published in Nucl. Instrum. Meth. A604:254-257, 2009
Refereed paper. 12th February.

2009

From the LHC to Future Colliders
De Roeck, A. and others
[Abstract] [PDF] [Journal] Proceeding of the workshop "From the LHC to Future Colliders"
Contribution to proceedings. 21st October.
Expectations for observation of top quark pair production in the dilepton final state with the early CMS data at $\sqrt{s} =$ 10 TeV
The CMS Collaboration
[Full text] CMS Physics Analysis Summary
Public experimental note. 8th July.
Track-based measurement of top-quark pair events in the dileptonic channels with the first data of CMS
J. Caudron, A. Giammanco, V. Lemaitre
[Full text] CMS Analysis Note
Private experimental note. 8th July.
Prospects for the measurement of the single-top $t$-channel cross section in the muon channel with 200~pb$^{-1}$ of CMS data at 10 TeV
The CMS Collaboration
[Full text] Physics Analysis Summary
Public experimental note. 8th July.
Towards a measurement of single-top cross section in the t-channel, with the first inverse femtobarn of CMS data at 14 TeV
A. Giammanco, J. Weinelt, T. Mueller, J. Wagner-Kuhr, P. Sturm, W. Wagner, D. Konstantinov, V. Molchanov, A. Jafari, M. Mohammadi Najafabadi, E. Boos, L. Dudko, A. Markina
[Full text] CMS Analysis Note
Private experimental note. 8th July.
FROG: The Fast & Realistic OpenGL Event Displayer
Loic Quertenmont
[Full text] Proceedings of the Conference: XVII International Conference on Computing in high Energy and Nuclear Physics (CHEP09), March 21-27, 2009, Prague, Czech Republic
Contribution to proceedings. 15th May.
FROG: The Fast & Realistic OpenGL Event Displayer
Loic Quertenmont & Vincent Roberfroid
[Full text] FROG CMS Note (Public)
20 pages, 35 figures

Public experimental note. 27th April.
NA62: Measurement of BR(K+ \to \pi+ \nu \bar{\nu})
Eduardo Cortina Gil
[Full text] Proceedings of the Conference: DISCRETE08, December 11-16, 2008 ,Valencia, Spain
Contribution to proceedings. 17th February.
FROG: The Fast & Realistic OpenGL Event Displayer
Loic Quertenmont
[Full text] Proceedings of the Conference: XII Advanced Computing and Analysis Techniques in Physics Researsh, November 3-7, 2008, Erice, Italy
Contribution to proceedings. 27th January.
FROG: The Fast & Realistic OpenGL Event Displayer
Loic Quertenmont, Vincent Roberfroid
[Full text] 26 pages, 15 figures, Submitted, Software manual,
Associated web site : http://projects.hepforge.org/frog/

18th January.

2008

The Top Quark Analysis Framework
Maria Hansen et al.
[Full text] Release note on CMS software.
Private experimental note. 22nd December.
Status and expectations for the first physics with the CMS detector at LHC
Andrea Giammanco
[Full text] CMS Conference Report (CMS CR-2008/104)
Contribution to proceedings. 9th December.
Exclusive gamma gamma -> l+l- and gamma p-> Yp ->l+l-p production
The CMS Collaboration
[Full text] Physics Analysis Summary of the exclusive dilepton production analysis that passed the full CMS approval procedure in 2008.
Public experimental note. 9th December.
Search for Heavy Stable Charged Particles with 100 pb-1 and 1 fb-1 in the CMS experiment
The CMS Collaboration
[Full text] The CMS Collaboration, "Search for Heavy Stable Charged Particles with 100 pb-1 and 1 fb-1 in the CMS experiment", CMS PAS EXO-08-003.
Physics Analysis Summary of an analysis that passed the full CMS approval procedure in april 2008. This document is public and, according to CMS rules, is signed by the whole CMS Collaboration. It is the summary of a much longer CMS analysis note signed by 15 CMS collaborators, among which G. Bruno (co-editor) and L. Quertenmont from UCL.

Public experimental note. 9th December.
Heavy Stable Charged Particles Searches at the LHC
G. Bruno for the ATLAS and CMS Collaborations
[Full text] G. Bruno, “Heavy Stable Charged Particles Searches at the LHC”, 2008 J. Phys.: Conf. Ser. 110 072005.
Contribution to proceedings. 9th December.
Search for Heavy Stable Charged Particles at the LHC
Loic Quertenmont
[Full text] DIS08 Proceedings
Contribution to proceedings. 18th September.
Luminosity determination by CMS using exclusive muon pairs with early data
X. Rouby, K. Piotrzkowski
[Full text] CMS AN 2008/061, Internal note (password protected)
Private experimental note. 18th July.
As an Introduction: Quest for New Physics in Photon-Photon Interactions at the LHC
K. Piotrzkowski
[Abstract] [PDF] [Journal] Contribution to Proceedings of the CERN workshop on High Energy Photon Collisions at the LHC, April 21-25, 2008,
Contribution to proceedings. 10th July.
Sensitivity to anomalous quartic gauge couplings
Tomasz Pierzchala and Krzysztof Piotrzkowski
[Abstract] [PDF] [Journal] Contribution to the CERN workshop on "High energy photon collisions at the LHC", April 2008
Contribution to proceedings. 7th July.
Tagging photon interactions at the LHC
Rouby, X.
[Abstract] [PDF] [Journal] Nuclear Physics B (Proc. Suppl.) 179–180 (2008) 202–210.
Contribution to the CERN workshop on high energy photon collisions at the LHC, April 2008.

Contribution to proceedings. 28th June.
Exclusive dilepton and Upsilon production with CMS: a feasibility study
S. Ovyn on behalf of the CMS Collaboration
[Full text] [CMS CR2008-036] Presented at the XVI International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS08), April 2008
Contribution to proceedings. 6th June.
High energy photoproduction at the LHC
S. Ovyn on behalf of the Louvain Photon group
[Journal] [Full text] Presented at the Joint Meeting Heidelberg-Liege-Paris-Wroclaw (HLPW08), Spa, 6-9 March 2008. Published as a volume of the AIP Conference Proceedings No 1038
Contribution to proceedings. 6th June.
Forward Physics at the LHC
Xavier Rouby
[Abstract] [PDF] Proceedings of Moriond QCD 2008.
Talk on behalf of the CMS and ATLAS collaborations.
CMS CR-2008/020

Contribution to proceedings. 19th May.
Forward Physics Triggers
S. Ovyn, X. Rouby, J.J. Hollar for the CMS Forward Physics Group
[Full text] Internal note CMS IN 2008/028 (password protected).
Private experimental note. 28th February.
Exclusive γ γ → l+ l- and γ p → Y → l+ l- production
J.J. Hollar, S. Oyvn, X. Rouby for the CMS collaboration
[Full text] Physics Analysis Summary [pdf], public summary of CP3-07-28
Public experimental note. 26th February.

2007

Improvement of the Kalman Filter Fit of the ZEUS experiment
V. Roberfroid
[Abstract] [PDF]
Public experimental note. 6th December.
Exclusive γ γ → l+ l- production
J. Hollar, S. Ovyn, X. Rouby
[Full text] CMS AN-2007/032 (internal)
Private experimental note. 22nd October.
Determination of the Discovery Potential for Higgs Bosons
Dorian Kcira
[Abstract] [PDF] SUSY07 proceedings.
Contribution to proceedings. 10th October.
Fast simulations of the ATLAS and CMS experiments at LHC
A. Giammanco, A. Perrotta
[Full text] CERN CMS CR-2007/010
Contribution to proceedings. 19th March.

2006

HERA and the LHC - A workshop on the implications of HERA for LHC physics: Proceedings Part B
Alekhin, S. and others
[Abstract] [PDF] Published in the Proceedings Part B (2005)
Contribution to proceedings. 2nd January.
HERA and the LHC - A workshop on the implications of HERA for LHC physics: Proceedings Part A
Alekhin, S. and others
[Abstract] [PDF] Published in Proceedings Part A (2005)
Contribution to proceedings. 2nd January.
Measurement of nucleon structure functions in neutrino scattering
Th. Delbar, D. Favart, Gh. Grégoire, S. Kalinin and Chorus collaboration Report
[Journal] Published in Phys. Lett. B632 (2006) 65-75
Refereed paper. 5th January.
Tau jet reconstruction and tagging with CMS
The CMS Collaboration
[Journal] Published in Eur. Phys. J. C - Particles and Fields, 46, s01, 1–21 (2006)
Public experimental note. 17th February.
HLT Steering Code Prototype
C. Delaere, V. Lemaitre, O. van der Aa, V. Roberfroid
[Full text] Published in CMS-IN-2006/001, CERN, 2006
Public experimental note. 28th January.
CMS technical design report, volume II: Physics performance
S. Assouak, J. L. Bonnet, G. Bruno, J. Caudron, B. de Callatay, J. de Favereau de Jeneret, S. de Visscher, C. Delaere, P. Demin, D. Favart, E. Feltrin, E. Forton, G. Grégoire, S. Kalinin, D. Kcira, T. Keutgen, G. Leibenguth, V. Lemaitre, Y. Liu, D. Michotte, O. Militaru, A. Ninane, S. Ovyn, T. Pierzchala, K. Piotrzkowski, V. Roberfroid, X. Rouby, D. Teyssier, O. van der Aa, M. Vander Donckt and CMS Collaboration
[Journal] Published in J. Phys. G34 (2007) 995-157
Refereed paper. 25th December.
CMS physics: Technical design report
G.L. Bayatian et al. (collaboration CMS)
Published in CERN-LHCC-2006-001
Public experimental note. 2nd February.
The CMS high level trigger
Adam, W. and others
[Abstract] [PDF] [Journal] Published in Eur. Phys. J. C46 (2006) 605-667
Refereed paper. 1st January.
CMS Physics TDR: Volume II (PTDR2), Physics Performance
V. Lemaitre (collaboration CMS)
[Journal] Published in J. Phys. G: Nucl. Part. Phys. 34 995-1579, 2007
Refereed paper. 1st March.
HERA and the LHC - A workshop on the implications of HERA for LHC physics: Proceedings Part A
Alekhin, S. and others
[Abstract] [PDF] Published in the Proceedings Part A (2005)
Contribution to proceedings. 2nd January.

2005

Measurement of topological muonic branching ratios of charmed hadrons produced in neutrino-induced charged-current interactions
A. Kayis-Topaksu et al. (collaboration CHORUS)
[Journal] Published in Phys. Lett. B626 (2005) 24-34
Refereed paper. 20th October.
Measurements of D0 production and of decay branching fractions in neutrino nucleon scattering
G. Onengut et al. (pour la collaboration Chorus)
[Journal] Published in Phys. Lett. B613 (2005) 105-117
Refereed paper. 3rd March.
Single W boson production at HERA
K. Piotrzkowski and ZEUS Collaboration
[Journal] Published in AIP Conf. Proc. 792 (2005) 579-582
Contribution to proceedings. 6th October.
High energy photon interactions at the LHC
K. Piotrzkowski
[Journal] Czech. J. Phys. 55:B731-B736,2005
Refereed paper. 6th October.
High energy photon interactions at the LHC
K. Piotrzkowski
[Journal] Published in AIP Conf. Proc. 792 (2005) 544-547
Contribution to proceedings. 6th October.
Jet energy correction with charged particle tracks in CMS
Kodolova, Olga and Bruno, G. and Vardanian, I. and Nikitenko, A. and Fano, L.
[Journal] Published in The European Physical Journal C - Particles and Fields C40S2 (2005) 33-42
Refereed paper. 22nd March.
Feasibility study of a XML-based software environment to manage data acquisition hardware devices
Arcidiacono R, et al.
[Journal] Published in Nucl. Instr. and Meth. A546 (2005) 324-329
Refereed paper. 1st July.
The effect of highly ionising particles on the CMS silicon strip tracker
W. Adam et al. - 404 authors
[Journal] Published in Nucl. Instr. and Meth. A543 (2005) 463-482
Refereed paper. 11th May.
CMS - The Computing Project - Technical Design Report
V. Lemaitre
Published in CERN-LHCC-2005-023, CMS TDR7, 137 pages
Public experimental note. 15th June.
CM - The Computing Project
V. Lemaitre
Published in CERN-LHCC-023, 137 pages
Public experimental note. 15th June.
Design and test beam performance of substructures of the CMS tracker end caps
R. Brauer et al.
Published in CERN-CMS-NOTE-2005-025
Public experimental note. 27th December.
RD50 status report 2005 : Radiation hard semiconductor devices for very high luminosity colliders
F. Campabadal et al.
Published in CERN-LHCC-2005-37, LHCC-RD-009, Dec 2005, 2005, 113pp
Public experimental note. 14th December.
Search for fermiophobic Higgs at LEP
V. Lemaitre for the ALEPH, DELPHI, L3 and OPAL collaborations
Published in Fundamental Interactions*, 2005, 199-203
Public experimental note. 27th February.
Design and test beam performance of substructures of the CMS tracker end caps
Brauer, R. and others
[Full text] Published in CERN-CMS-NOTE-2005-025
Public experimental note. 14th December.
FP420: An R&D proposal to investigate the feasibility of installing proton tagging detectors in the 420-m region at LHC
M.G. Albrow et al.
Published in CERN-LHCC-2005-025
Public experimental note. 2nd June.
Improved measurement of the triple gauge-boson couplings gamma W W and Z W W in e+ e- collisions
S. Schael et al. (ALEPH Collaboration)
[Journal] Published in Phys. Lett. B614 (2005) 7-26
Refereed paper. 12th May.
Single vector boson production in e+ e- collisions at centre-of-mass energies from 183-GeV to 209-GeV
S. Schael et al. (ALEPH Collaboration)
[Journal] Published in Phys. Lett. B605 (2005) 49-62
Refereed paper. 6th January.


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