Laurent Forthomme
Former member
PhD student in CP3 from September 2010
My personal homepage
Cosmic Bench
Wiki page: here

GIT repository: here
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).

Show past projects.
Publications in CP3
Showing 5 publications over 7. Show all publications.
All my publications on Inspire


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.


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.


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.
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.


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.

[UCLouvain] - [SST] [IRMP] - [SC] [PHYS]
Contact : Jérôme de Favereau
Job opportunities Summer Students program (Masters) 2017
Summer Student program in CP3 for BAC 3 (2017)
PhD position in NA62 experiment