Contact
Name
Andrea Giammanco

Position
Research scientist

Email
Centre for Cosmology, Particle Physics and Phenomenology - CP3
Université catholique de Louvain
2, Chemin du Cyclotron - Box L7.01.05
B-1348 Louvain-la-Neuve
Belgium

Phone
+32 10 47 3221

Office
Personal homepage
People responsibilities
Postdocs
Pieter David (FNRS) (member since February 2016)
Experimental particle physicist, member of the CMS collaboration. Constraining new physics (in an EFT framework) in the production of top quarks together with bosons, and contributing to strip tracker calibration and software development.
Raveendrababu Karnam (UCL-FSR) (member since July 2020)
Muon radiography: R&D of a portable muoscope, and data analysis for the MURAVES experiment.

Visitors
PhD students
Marwa Al Moussawi (FNRS - PDR) (member since February 2020)
Samip Basnet (FNRS - FRIA) (member since May 2019)
Imaging of large structures with cosmic-ray muons.
Ishan Darshana (UCL-CAI) (member since October 2019)
R&D for a portable cosmic muon detector.
Hesham El Faham (Other - VUB) (member since October 2018)
Phenomenology of top quark and heavy ions physics at the LHC. CMS analysis interpretation.
Ahmet Ilker Topuz (member since October 2020)
Simulations for muography. Co-supervision with Tartu University.
Tu Thong Tran (EOS - EOS) (member since October 2018)
I study Electroweak couplings of the top quark in the production of top - anti top pair in association with a vector boson (W, Z).

Former members
Research statement
I am a Maître de Recherches (Senior Researcher) of FNRS, with 100% focus on research (0% teaching).
Broadly speaking, I am interested into:

# Muography, i.e., the application of HEP detectors and techniques for mapping the interior of large structures using atmospheric muons from cosmic ray showers.
* Co-leading, with Eduardo Cortina, the Portable Muoscope project at CP3 (see https://cp3-git.irmp.ucl.ac.be/muographycp3).
* Member of the MUon RAdiography of VESuvius (MURAVES) collaboration.
* Member of the EU-funded SilentBorder consortium, aiming at building practical and cheap muon scanners for border controls.
# Analysis of CMS data at LHC; more specifically:
* Top quark physics: the sixth quark is quite unusual (who ordered that 175 GeV monster?). Could it be the key to unlock the mystery of what's beyond the Standard Model? I have been recently (Sep.2014-Aug.2016) leading the CMS group devoted to that.
* Higgs boson couplings (with the top quark and with new particles): being the last particle to have been discovered, and by far the most crucial of them all, it is rather natural to check if that famous 125 GeV resonance tells us something that we did not expect. Since Jan.2018, I am one of the coordinators of the work package "Higgs coupling determination and interpretation" of the be.h Belgian HEP consortium.
* Unusual signatures of new physics: our multi-purpose detectors were optimized for as many interesting signatures as possible, but I like when someone proposes original ways to use them, that can actually cover some blind spot of traditional searches.
# Parametric detector simulations.
# Some forays into HEP phenomenology, in collaboration with theorists.
# Applied statistics (machine learning, unfolding, etc.)
Projects
Research directions:
Experiments and collaborations:
Active projects
Advanced Multi-Variate Analysis for New Physics Searches at the LHC
Agni Bethani, Florian Bury, Christophe Delaere, Andrea Giammanco, Vincent Lemaitre, Fabio Maltoni, Pietro Vischia

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 have been part of AMVA4NewPhysics, a network of European institutions whose goal is to foster the development and exploitation of Advanced Multi-Variate Analysis for New Physics searches. The network offered between 2015 and 2019 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.
Development of a framework for fast simulation of a generic collider experiment: Delphes
Jérôme de Favereau, Christophe Delaere, Pavel Demin, Andrea Giammanco, Vincent Lemaitre

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.
Imaging with cosmic-ray muons
Marwa Al Moussawi, Samip Basnet, Eduardo Cortina Gil, Ishan Darshana, Antoine Deblaere, Pavel Demin, Andrea Giammanco, Raveendrababu Karnam, Ahmet Ilker Topuz

The general goal of this project is to develop muon-based radiography or tomography (“muography”), an innovative multidisciplinary approach to study large-scale natural or man-made structures, establishing a strong synergy between particle physics and other disciplines, such as geology and archaeology.
Muography is an imaging technique that relies on the measurement of the absorption of muons produced by the interactions of cosmic rays with the atmosphere.
Applications span from geophysics (the study of the interior of mountains and the remote quasi-online monitoring of active volcanoes) to archaeology and mining.

We are part of the H2020-MSCA-RISE network INTENSE where we coordinate the Muography work package, which brings together particle physicists, geophysicists, archaeologists, civil engineers and private companies for the development and exploitation of this imaging method.

We are also part of the H2020-RIA project SilentBorder, which aims at developing new muon scanners at border controls.

We are using the local facilities at CP3 for the development of high-resolution portable detectors.
We also participate to the MURAVES collaboration through simulations and data-analysis developments (an example of the latter is the implementation and in-situ calibration of time-of-flight capabilities).

External collaborators: UGent; Kyushu University; INTENSE Research & Innovation Staff Exchange network (Japan, Switzerland, Italy, France, Hungary); SilentBorder network (Estonia, Germany, Finland, Turkey, Italy, UK); MURAVES Collaboration including INFN, INGV, universities of Florence and Federico II Naples, UGent.
Machine-learning Optimized Design of Experiments
Christophe Delaere, Andrea Giammanco, Pietro Vischia

We are among the founders of MODE (Machine-learning Optimized Design of Experiments, https://mode-collaboration.github.io/), a multi-disciplinary consortium of European and American physicists and computer scientists who target the use of differentiable programming in design optimization of detectors for particle physics applications, extending from fundamental research at accelerators, in space, and in nuclear physics and neutrino facilities, to industrial applications employing the technology of radiation detection.

We aim to develop a modular, customizable, and scalable, fully differentiable pipeline for the end-to-end optimization of articulated objective functions that model in full the true goals of experimental particle physics endeavours, to ensure optimal detector performance, analysis potential, and cost-effectiveness.
The main goal of our activities is to develop an architecture that can be adapted to the above use cases but will also be customizable to any other experimental endeavour employing particle detection at its core. We welcome suggestions, as well as interest in joining our effort, by researchers focusing on use cases for which this technology can be of benefit.

Two CP3 members currently serve as members of the MODE Supervisory Board.

External collaborators: University of Padova, INFN, Université Clermont Auvergne, Higher School of Economics of Moscow, CERN, University of Oxford, New York University, ULiege.
New Paths to Hidden Sectors
Marco Drewes, Andrea Giammanco

We study the perspectives to search for new long lived particles with existing accelerator facilities. This includes searches for non-standard signatures at the LHC main detectors, fixed target experiments and searches in heavy ion collisions.
Properties ttW production
Pieter David, Andrea Giammanco, Tu Thong Tran

We take advantage of the large statistics being recorded by the CMS experiment in Run 2 to launch a systematic study of cross section, angular asymmetries and other properties 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.

External collaborators: Didar Dobur and her team in UGent.
Single top studies at LHC
Andrea Giammanco

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

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. We then update the result with a new publication making use of the larger statistics collected at the end of 2017. This measurement, in addition to being 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.

We then reported the first observation of top quark production in p-Pb collisions, 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. Finally, we provided evidence of top quark production also in Pb-Pb collisions.

We are interested in using future PbPb collision data to probe the time evolution of the QGP using top quarks.

External collaborators: David D'Enterria, Pedro Silva (CERN), Georgios Krintiras (Kansas U.).

Non-active projects
Publications in CP3
All my publications on Inspire

Number of publications as CP3 member: 105

Last 5 publications

2021

CP3-21-10: Toward Machine Learning Optimization of Experimental Design
MODE collaboration

[Full text]
Nuclear Physics News, 31:1 (2021), 25-28
March 31.
CP3-21-07: Measurement of the inclusive tt production cross section in pp collisions at sqrt(s)=5.02TeV
CMS Collaboration

[Full text]
Physics Analysis Summary for the Spring'21 conferences. To be superseded by the corresponding paper.
Public experimental note. March 21.

2020

CP3-20-51: Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at $\sqrt{s} =$ 13 TeV
Sirunyan, Albert M and others

[Abstract] [PDF]
Submitted to EPJC
Refereed paper. November 10.
CP3-20-33: Test beam demonstration of silicon microstrip modules with transverse momentum discrimination for the future CMS tracking detector
CMS Tracker Collaboration

[Journal] [Full text]
Published in: JINST 13 (2018) 03, P03003, Report number: FERMILAB-PUB-18-385-CMS, CERN-CMS-NOTE-2017-010

O. Bondu5, S. Brochet5, A. Caudron5, S. De Visscher5, B. Francois5, A. Jafari5, J. Cabrera Jamoulle5, M. Komm5, G. Krintiras5, A. Magitteri5, A. Mertens5, D. Michotte5, M. Musich5,, L. Quertenmont5, M. Vidal Marono5,
Refereed paper. July 2.
CP3-20-32: Beam test performance of prototype silicon detectors for the Outer Tracker for the Phase-2 Upgrade of CMS
CMS Tracker Group

[Journal] [Full text]
Published 17 March 2020 • © 2020 CERN for the benefit of the CMS collaboration.
Refereed paper. July 2.

More publications