Laurent Forthomme

Former member
Member from September 2010 to April 2016
Current position: Postdoctoral researcher at the University of Helsinki

Personal homepage
Cosmic Bench
Wiki page: here

GIT repository: here
Research directions:
Phenomenology of elementary particles
Data analysis in HEP, astroparticle and GW experiments
Research and development of new detectors

Experiments and collaborations:

Active projects
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. Such a detector is essential for selecting exclusive and semi-exclusive processes at high luminosity, and can also be applied for the timing and particle ID at future experiments.

Investigate new techniques for ToF-PET.

External collaborators: CMS PPS project, M. Albrow (Fermilab), C. Royon (Kansas), J. Varela (Lisbon), and E. Schnys (Photonis) and J. Howorth (Photek Ltd).
High energy photon-induced interactions
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, first measurements of two-photon muon pair production were performed as well as first ever observation of W boson pairs produced by photon fusion. Now unique investigations of quartic couplings between photons and W and Z bosons are being pursued.

Surveying the scientific potential of the new e-ion collider at Brookhaven (EIC) and the future LHeC at CERN.

External collaborators: M. Klein (Liverpool), Y. Yamazaki (Tokyo), B. Surrow (Philadelphia) and the groups of M. Przybycien and J. Chwastowski (Krakow).

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

Number of publications as CP3 member: 7 Download BibTeX

Last 5 publications


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.


CP3-15-34: 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. October 3.


CP3-14-62: 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] [Dial]
26 pages, 40 figures, 2 tables, submitted to JHEP
Refereed paper. September 4.
CP3-14-04: 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. January 8.


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.

More publications