Contact
Name
Gustavo Gil Da Silveira

Position
Former member
Postdoc in CP3 from February 2012 to March 2014
Current position: Professor
Research statement
Working on high-energy photon interactions, particularly studying the electroweak boson photoproduction in exclusive events at the LHC. This approach allows one to employ the calculation with no need of a parametrization for the elastic interaction.

Working on exclusive production at the LHC, especially in the analysis of the data from the CMS detector.
Projects
Research directions:
Experiments and collaborations:
Active projects
Fast Simulation of the CMS experiment
Andrea Giammanco

A framework for Fast Simulation of particle interactions in the CMS detector (FastSim) has been developed and implemented in the overall simulation, reconstruction and analysis framework of CMS. It produces data samples in the same format as the one used by the Geant4-based (henceforth Full) Simulation and Reconstruction chain; the output of the Fast Simulation of CMS can therefore be used in the analysis in the same way as data and Full Simulation samples. FastSim is used in several physics analyses in CMS, in particular those requiring a generation of many samples to scan an extended parameter space of the physics model (e.g. SUSY) or for the purpose of estimating systematic uncertainties. It is also used by several groups to design future sub-detectors for the Phase-II CMS upgrades.
Related activities at UCL include the integration with the Full Simulation in the simulation of the electronic read-out ("digitization") and of the pileup of events from other proton-proton collisions, both in-time and out-of-time; the performance monitoring; and the overall maintenance and upgrade of the tracking-related code. Matthias Komm is current L3 convener of Tracking in FastSim, and Andrea Giammanco has been main responsible of the FastSim project from 2011 to 2013.
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).
Publications in CP3
All my publications on Inspire

Number of publications as CP3 member: 7

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.

2015

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.

2014

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.
CP3-14-34: Exclusive processes in pp collisions in CMS
da Silveira, Gustavo G.

[Abstract] [PDF]
7 pages, 6 figures, presented at the XXI International Workshop on Deep-Inelastic Scattering and Related Subjects, April 2013, Marseille, France
Contribution to proceedings. June 11.
CP3-14-33: Exclusive production of $W$ pairs in CMS
da Silveira, Gustavo G.

[Abstract] [PDF]
8 pages, 10 figures, 1 table, Proceedings of the 2nd International Conference on New Frontiers in Physics, Kolymbari, Crete, Greece, Aug. 28th -- Sept. 5th, 2013
Contribution to proceedings. June 11.

More publications