Présidents de session
Standard Model
- Mykola Khandoga (LPNHE)
Standard Model
- Mykola Khandoga (LPNHE)
Standard Model
- Mykola Khandoga (LPNHE)
Un nouveau boson dont les propriétés s’apparentent à celles du boson de Higgs standard a été découvert en 2012 par les collaborations CMS et ATLAS au CERN. Depuis, les efforts se concentrent sur la mesure de précision de certaines de ses caractéristiques. Cette présentation a pour objectif de présenter la mesure des propriétés CP du boson de Higgs à travers ses différents couplages aux autres...
The calibration of the Liquid Argon Electromagnetic Calorimeter at the ATLAS experiment is done with $\mathrm{Z}\rightarrow ee$ Data and MC. While the continuous efforts of the collaboration have improved the agreement between both samples, there is a remaining non-negligible discrepancy between the Data and MC dilepton invariant mass lineshape that has not been accounted for by existent...
The Higgs decay into two Z bosons, each Z decaying into two charged leptons (hence Higgs-to-4-lepton decay) is called the golden channel as it is one of the Higgs decay channels with the cleanest signal. The study of the off-shell Higgs offers new possibilities of analysis beyond the on-shell data. The off-shell region is defined as a centre-of-mass energy of more than 220 GeV.
We thus have...
For many Standard Model (SM) measurements and searches for new phenomena, jet-calibration is crucial and b-jets are involved in some important final states as for example the main decay of the Higgs boson is into pairs of b-quarks (H→bb).
To properly reconstruct the kinematics of those processes, an accurate calibration of the b-jet energy is hence required.
Up until now, there was no...
A bosonic particle with a mass equals to 125GeV was observed in 2012, by ATLAS and CMS collaborations at the Large Hadron Collider (LHC). This particle was associated with the Higgs Boson or BEH boson, predicted fifty years before its discovery by François Englert, Robert Brout and Peter Higgs. This particle validates the BEH mechanism, explaining the origin of the mass of known particles and...
