Jet reconstruction in the ATLAS experiment at the Large Hadron Collider
| Date/Time: | Wednesday, 11 Apr 2018 from 2:10 pm to 3:10 pm |
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| Location: | A421, Zaffarano Hall |
| Cost: | Free |
| Contact: | Chunhui Chen |
| Phone: | 515-294-5062 |
| Channel: | College of Liberal Arts and Sciences |
| Categories: | Lectures |
| Actions: | Download iCal/vCal | Email Reminder |
An important part of the final state generated by the proton-proton collisions at the Large Hadron Collider (LHC) at CERN, Geneva, Switzerland, are jets of collimated particles. These jets can either be representations of the direct emission of fundamental particles (partons in the Standard Model of particle physics) or indications of the decay of a heavy short-lived particle into such partons. The ATLAS experiment at the LHC reconstruct these jets and their internal momentum flow structure to measure important features of the Standard Model and to exercise searches for new physics beyond the Standard Model. The reconstruction is mainly based on signals generated by the energy deposits of particles in the ATLAS calorimeter. It addresses several challenges introduced by the experimental setup, the calorimeter signal features, and an environment characterized by a relatively large number of proton-proton collisions occurring at the same time as the one collision of interest.
This talk starts with a brief pedagogical introduction into jet phenomenology, followed by a presentation of the most important experimental considerations. The full reconstruction and calibration schemes, as motivated by these considerations and applied to the data taken during the ongoing LHC Run 2, are described. Selected recent results of ATLAS measurements of the internal substructure of jets and their use in the identification of heavy Standard Model particles like the W boson and the top quark are discussed.