Simone Pagan Griso (LBNL): Charged particle reconstruction in the ATLAS experiment at the LHC

jeudi 10 sept. 2015, 14:00 → 15:00 Europe/Paris

1222-RC/SB-08 (LPNHE)

During a typical crossing of protons beams at the LHC, up to 40 proton-proton inelastic collisions happen giving rise to hundreds to thousands charged particles traversing the inner part of the ATLAS detector.
The reconstruction of the trajectories of these charged particles is crucial in interpreting the physics behind these collisions and it is one of the main building blocks for reconstructing and identifying more complex objects (electrons, muons, etc..).
In this seminar I will briefly review the algorithms used to reconstruct charged particles in the inner part of the ATLAS detector and their performance during the first years of operations of the LHC as well as the first results using the recent sqrt(s)=13 TeV collisions data collected during the just-started Run-2 of the LHC.
I will describe some of the main challenges we face in the current data-taking conditions and recent developments aimed to address them. I will finally give an outlook on what is ahead of us, up to the so-called phase-II upgrade around 2022, which will see an upgrade of the current inner tracking detector to face an increase instantaneous luminosity of the LHC machine, leading to of the order of 150-200 proton-proton collisions happening in the same bunch crossing.
 

Noter bien que la salle n'est pas l'amphi Georges Charpak.

Transparents spagan_Tracking_LPNHE.pdf