Contact
Name
Krzysztof Piotrzkowski
Position
Professor
Email
krzysztof.piotrzkowskclouvain.be
Address
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 3244
Office
UCL member card
Teaching
PHY1311 Classical Electrodynamics (37.5 + 15 h)

PHY2372 Experimental Methods (35 + 12.5 h)

PHY2133 Physics of Elementary Particles II (30h)

PHY2360 Introduction to Radiation and Atomic and Nuclear Physics (22.5h)
People responsibilities
Former members
Mohammed El Amine Benaichouche, PhD student in CP3

Gustavo Gil Da Silveira (CNPq/Brazil), Postdoc in CP3 from February 2012 to March 2014
Current position: Professor.

Laurent Forthomme, PhD student in CP3 from September 2010 to April 2016
Current position: Postdoctoral researcher at the University of Helsinki.

Jonathan Hollar (PAI), Postdoc in CP3 from November 2009

Tomasz Pierzchala (PAI), Postdoc in CP3 from September 2004 to December 2008

Maxime Renaud (UCL), PhD student in CP3 from September 2014 to September 2016

Xavier Rouby (UCL), PhD student in CP3 from September 2002 to July 2010
Current position: Founder & Director at Pfease (www.pfease.com).

Nicolas Schul (IISN), PhD student in CP3 from September 2006 to August 2011
Current position: SWIFT - Capacity Planner.

Thomas Van den Schrieck, Master student in CP3

Research statement
Studying high-energy photon interactions at hadron colliders. In particular, interested by exclusive two-photon production of pairs of heavy charged particles at the LHC.

Working on novel tests of the gauge boson sector of the Standard Model and searches of physics beyond the SM as supersymmetry, for example. Involved also in studies of photoproduction of top quarks at the LHC.

Working on photo-production tagging techniques, using very forward, near beam detectors within the CMS High Precision Spectrometer project. In particular, developing novel, ultra-fast Cerenkov timing detectors with picosecond resolution.

Has expertise in precise luminosity measurements at colliders using QED processes, as the exclusive lepton pair production at the LHC.

Member of CMS and ZEUS collaborations.
Projects
I am involved in the following research directions:

GasToF: ultra fast timing detector

GasToF (Gas Time-of-Flight) detector is a Cherenkov detector developed for very precise (with ~10 ps resolution) flight time measurements of very forward protons at the LHC. Such an excellent time resolution allows, using z-by-timing technique, for precise measurements of the event vertex z-coordinate and the background reduction. This detector is essential for selecting exclusive and semi-exclusive processes at the LHC, and can also be applied for the particle ID at future experiments.

External collaborators: CMS PPS project, M. Albrow (Fermilab), M. Khakzad (Tehran), J. Varela (Lisbon), and E. Schnys (Photonis) and J. Howorth (Photek Ltd).

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).

Past projects
Hide past projects.

I am involved in the following research directions:

Anomalous interactions between the photon and top quark

We study the observation of single top quarks in photoproduction at the LHC as a way of detecting the presence of flavour changing neutral currents, predicted by some theories beyond the standard model.

Hector, the simulator

Hector is a fast, multi-purpose simulator for the path of particles into beamlines.

It is build to be adaptative to any beamline and is already used by people from CMS (as a part of the official software) and ATLAS at the LHC and STAR at RHIC.

It is written in C++ and uses the ROOT framework to provide nice tools for analysis.

Results were cross-checked versus MAD-X, the official software used by the LHC machine group. It already allowed to obtain many estimations in terms of acceptance and resolutions of very forward detectors, as well as the effect of beamline misalignements and other related important topics related to forward detectors.

In collaboration with Xavier Rouby (Freiburg, D).

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.

RD39

Cryogenic detectors development for very high radiation environment.

External collaborators: RD39 collaboration.

Publications in CP3
All my publications on Inspire

2017

The Phase-2 Upgrade of the CMS Tracker
CMS collaboration
[Full text] CERN-LHCC-2017-009 ; CMS-TDR-014
Refereed paper. 13th December.

2016

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.

2015

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.

2014

Central $\mu^{+}\mu^{-}$ production via photon-photon fusion in proton-proton collisions with proton dissociation
Gustavo Gil da Silveira, Laurent Forthomme, Krzysztof Piotrzkowski, Wolfgang Sch\"afer, and Antoni Szczurek
[Abstract] [PDF] [Journal] 26 pages, 40 figures, 2 tables, submitted to JHEP
Refereed paper. 4th September.

2013

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.

2012

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.

2011

Measurement of the exclusive two-photon production of muon pairs at the LHC
The CMS Collaboration
[Full text]
Public experimental note. 30th June.
Proton-Nucleus Collisions at the LHC: Scientific Opportunities and Requirements
Salgado, C. A. and others
[Abstract] [PDF] [Journal] Published in J. Phys. G: Nucl. Part. Phys. 39 (2012) 015010.
Refereed paper. 25th May.

2010

CMS Tracking Performance Results from early LHC Operation
CMS collaboration
[Abstract] [PDF] [Journal] [Full text] Published in Eur.Phys.J.C70:1165-1192,2010.
Refereed paper. 21st December.

2009

Alignment of the CMS Silicon Tracker during Commissioning with Cosmic Rays
CMS Collaboration
[Abstract] [PDF] [Journal] [Full text] CMS PAPER CFT-09-003
Published in JINST

Refereed paper. 26th December.
Commissioning and Performance of the CMS Pixel Tracker with Cosmic Ray Muons
CMS Collaboration
[Abstract] [PDF] [Journal] [Full text] CMS-CFT-09-001.
Published in JINST

Refereed paper. 26th December.
Commissioning of the CMS Experiment and the Cosmic Run at Four Tesla
CMS Collaboration
[Abstract] [PDF] [Journal] [Full text] Published in JINST
Refereed paper. 21st December.
CMS Data Processing Workflows during an Extended Cosmic Ray Run
CMS Collaboration
[Abstract] [PDF] [Journal] [Full text] Published in JINST
Refereed paper. 21st December.
Commissioning and Performance of the CMS Silicon Strip Tracker with Cosmic Ray Muons
CMS Collaboration
[Abstract] [PDF] [Journal] [Full text] Published in JINST
Refereed paper. 21st December.
Stand-alone Cosmic Muon Reconstruction Before Installation of the CMS Silicon Strip Tracker
CMS Tracker Collaboration (W. Adam et al.).
[Abstract] [PDF] [Journal] [Full text] Published in JINST 4:P05004,2009
Refereed paper. 21st December.
Alignment of the CMS Silicon Strip Tracker during stand-alone Commissioning.
W. Adam et al.
[Abstract] [PDF] [Journal] Published in JINST 4:T07001,2009
Refereed paper. 21st December.
Two-photon exclusive production of supersymmetric pairs at the LHC
Krzysztof Piotrzkowski, Nicolas Schul
[Abstract] [PDF] [Journal] Proceedings of the 17th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY09), Northeastern University, Boston, MA, USA, 5-10 June 2009
Contribution to proceedings. 1st October.
High energy photon interactions at the LHC
J. de Favereau de Jeneret, V. Lemaitre, Y. Liu, S. Ovyn, T. Pierzchala, K. Piotrzkowski, X. Rouby, N. Schul and M. Vander Donckt
[Abstract] [PDF]
Refereed paper. 14th August.

2008

Petal Integration for the CMS Tracker End Caps
T. Bergauer, et al.
[Full text] CMS NOTE-2008/028. Public CMS note (internally peer-reviewed) about the construction of the CMS forward tracker.
Public experimental note. 22nd December.
The CMS experiment at the CERN LHC
The CMS Collaboration
[Journal] [Full text] The CMS Collaboration, "The CMS experiment at the CERN LHC", 2008 JINST 3 S08004, 361pp doi: 10.1088/1748-0221/3/08/S08004.
Refereed paper. 10th December.
Silicon Strip Tracker Detector Performance with Cosmic Ray Data at the Tracker Integration Facility
J.-L. Bonnet, G. Bruno, B. De Callatay, B. Florins, A. Giammanco, G. Gregoire, Th. Keutgen, D. Kcira, V. Lemaitre, D. Michotte, O. Militaru, K. Piotrzkowski, L. Quertermont, V. Roberfroid, X. Rouby, D. Teyssier et al. (>100 authors)
[Full text] W. Adam et al., "Silicon Strip Tracker Detector Performance with Cosmic Ray Data at the Tracker Integration Facility", CMS NOTE-2008/032.
Public experimental note. 10th December.
The CMS tracker operation and performance at the Magnet Test and Cosmic Challenge
S. Assouak, J.-L. Bonnet, G. Bruno, B. de Callatay, S. de Visscher, D. Favart, B. Florins, E. Forton5, A. Giammanco, G. Gregoire, S. Kalinin, D. Kcira, Th. Keutgen, V. Lemaitre, D. Michotte, O. Militaru, S. Ovyn, K. Piotrzkowski, X. Rouby, D. Teyssier, O. Van der Aa et al. (> 100 authors)
[Journal] [Full text] W. Adam et al., “The CMS tracker operation and performance at the Magnet Test and Cosmic Challenge”, 2008 JINST 3 P07006. doi: 10.1088/1748-0221/3/07/P07006.
G. Bruno co-editor

Refereed paper. 10th December.
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.
Detection of two-photon exclusive production of supersymmetric pairs at the LHC
Nicolas Schul, Krzysztof Piotrzkowski
[Abstract] [PDF] [Journal] Contribution to the CERN workshop on high energy photon collisions at the LHC, April 2008
Contribution to proceedings. 6th June.
High energy photon interactions at the LHC
J. de Favereau et al.
[Abstract] [PDF] [Full text] Submitted. See CP3-09-37.
28th January.

2007

Hector, a fast simulator for the transport of particles in beamlines
J. de Favereau, X. Rouby, K. Piotrzkowski
[Abstract] [PDF] [Journal] [Full text] Published in JINST2:P09005,2007
Refereed paper. 14th May.
Axion beams at HERA?
K. Piotrzkowski
[Abstract] [PDF]
9th January.

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.
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.
GASTOF: Ultra-fast ToF forward detector for exclusive processes at the LHC
L. Bonnet, T. Pierzchala, K. Piotrzkowski, P. Rodeghiero
[Abstract] [PDF] Presented at "Physics at LHC 2006", Krakow. Published in Acta Physica Polonica B38 (2007) 477-482
Contribution to proceedings. 8th December.
Cryogenic detector modules and edgeless silicon sensors
X. Rouby, V. Eremin, S. Grohmann, J. Härkönen, Z. Li, P. Luukka, O. Militaru, T. Niinikoski, G.Nüssle, B. Perea Solano, K. Piotrzkowski, E. Tuovinen, E. Verbitskaya
[Journal] [Full text] Proceedings of the RD05 Conference, October 2005. Nucl. Inst. & Meth. A570 (2007) 308-311
Contribution to proceedings. 23rd October.

2005

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.
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.
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.


[UCLouvain] - [SST] [IRMP] - [SC]
Contact : Jérôme de Favereau
Research
Job opportunities Postdoctoral Position on advanced analysis techniques applied to the CMS di-Higgs study
Post-doctoral positions in collider phenomenology and particle astrophysics
EOS be.h : 10 PhD positions