PHENIICS Doctoral School Days

Session

High-energy physics

9 mai 2016, 14:30

Auditorium Pierre Lehmann (Laboratoire de l'Accélérateur Linéaire (LAL))

Description

Chairperson: Martina MACHET

97. Search for the Standard Model Higgs boson decaying into bb and produced in association with a top quark pair in the ATLAS experiment

M. Eloi Le Quilleuc (CEA IRFU/SPP)

09/05/2016 14:30

Particle Physics

Oral Presentation

I am a 2nd year PhD student working in the ATLAS experiment at Cern. In this collaboration, I mainly contributed to the identification of b-jets. I optimized the reconstruction of secondary vertices at high jet momentum, improved the recognition of B-hadron vertices against V0 vertices, and brought some corrections to a Boosted Decision Tree algorithm (that combines b-tagging informations into...

102. The photon polarisation in radiative B decay.

M. jeremy hebinger (lal)

09/05/2016 14:45

Particle Physics

Oral Presentation

In rare B mesons decay such as $b \to s\gamma$, standard model predictions indicate that the photon should be mostly left-handed. And since the GIM mechanism allows this process to only occurs through loops, measurements of the photon polarisation can provide a good test of the standard model. Indeed, if new physics heavy particles contribute to the process the photon polarisation may change....

106. Standalone track reconstruction for the LHCb upgrade scintillating fibre tracker and study of double charm B decays at LHCb.

M. Renato Quagliani (LAL Orsay and Bristol University)

09/05/2016 15:00

Particle Physics

Oral Presentation

The project of the LHCb upgraded detector foresees the presence of a scintillating fiber tracker (SciFi) for the LHC run III starting in 2020. We will describe the design and the performances of the newly developed algorithm used for the reconstruction of stand-alone tracks in the SciFi, called Hybrid Seeding. The B mesons double charm decays have been introduced to explain the discrepancy...

105. Measurement of Higgs boson couplings in the diphoton decay channel with the ATLAS experiment

M. Christophe Goudet (LAL)

09/05/2016 15:15

Particle Physics

Oral Presentation

The run 2 of the LHC starts an era of precision measurement in the Higgs sector which may be a portal to Beyond Standard Model physics. To be sensitive to BSM, an improvement of the systematics is necessary. The final step of the electron energy correction, which is part of the dominant experimental uncertainties, uses a data driven technique to calibrate the energy of...