Contact
Name
Jonathan Hollar

Position
Former member
Postdoc in CP3 from November 2009
Projects
Research directions:
Phenomenology of elementary particles
Data analysis in HEP experiments
Detector commissioning, operation and data processing
Research and development of new detectors

Experiments and collaborations:
CMS
FP420

Active projects
GasToF: ultra fast timing detector
Krzysztof Piotrzkowski

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
Krzysztof Piotrzkowski

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).

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

Number of publications as CP3 member: 7 Download BibTeX

Last 5 publications

2016

CP3-16-13: 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] [Dial]
Submitted to JHEP
Refereed paper. April 19.

2013

CP3-13-24: 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] [Dial] [Full text 1] [Full text 2]
Published in JHEP 07 (2013) 116 [FSQ-12-010]
Refereed paper. May 31.

2012

CP3-12-18: 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] [Dial] [Full text]
Published in the Journal of High Energy Physics
Refereed paper. April 10.

2011

CP3-11-22: Measurement of the exclusive two-photon production of muon pairs at the LHC
The CMS Collaboration

[Full text]
Public experimental note. June 30.

2010

CP3-10-40: CMS Tracking Performance Results from early LHC Operation
CMS collaboration

[Abstract] [PDF] [Journal] [Dial] [Full text]
Published in Eur.Phys.J.C70:1165-1192,2010.
Refereed paper. December 21.

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