Choisissez le fuseau horaire
Le fuseau horaire de votre profil:
Séminaires, soutenances
Séminaire de 2ème année de thèse: Jet Global Sequential Calibration at ATLAS
par
→
Europe/Paris
Amphi Recherche (Dept Phys.)
Amphi Recherche
Dept Phys.
Description
A jet here is a spray of particles produced by the hadronization of a quark or a
gluon in a high energy collision. Jets are extremely important as they are
present in the final states of many decay analysis. The ATLAS detector, one of
the six experiments at the LHC, measures the properties of jets produced in
proton-proton (pp) collisions using primarily the energy signal deposited in
its calorimeters by the particles. But the measured energy does not correspond
to the initial energy carried by the particles; in other words the response of
the calorimeter is different from one. This is due mainly to calorimeter
effects, jet reconstruction effects, underlying events and/or pile up.
The correction of the calorimeter response and the achievement of the optimal
jet energy resolution are of key importance to many LHC physics analyses. In
order to achieve these goals ATLAS have developed several jet calibration
schemes, one of them is called Global Sequential (GS) Calibration. GS is a
sequential jet calibration based on transversal and longitudinal properties of
the jet structure. The performance of the GS in simulations, its validation
using real data and its associated systematic uncertainty will be discussed in
this seminar.
