Sep 25 – 30, 2023
Protea Hotel King George
Africa/Johannesburg timezone

Measurement of the Energy Response of the ATLAS Calorimeter to Charged Pions from tau-lepton Decays in Run 2 Data

Sep 25, 2023, 4:30 PM
Regency Room (Protea Hotel King George)

Regency Room

Protea Hotel King George

Contributed Oral Presentation Physics Research Parallel Session 1


Meryem Noury (Universite Hassan II, Ain Chock (MA))


The measurement of the ATLAS calorimeter response E/pT is performed for single charged pions with a transverse momentum (pT ) ranging from 10 to 300 GeV using 139 fb−1 of proton-proton collision data at √s=13 TeV taken in RUN 2 by the ATLAS detector of the Large Hadron Collider (LHC) [1]. The use of charged pions originating from τ-lepton decays allows the measurement of the response of the calorimeter in the high pT regime. In the ATLAS simulation, this response is found to be approximately 2% overestimated in the central region and 4% underestimated in the endcaps. The uncertainties in the measurements in the central region are less than 1% for pT ranging from 15 to 185 GeV and reach 0.6% in the most precise region. A brief introduction about the ATLAS calorimeter will be presented, followed by a description of the event selection. The energy response as well as the uncertainties in the measurements will also be evaluated [2].

[1] ATLAS Collaboration, The ATLAS Experiment at the CERN Large Hadron Collider
[2] Measurement of the Energy Response of the ATLAS Calorimeter to Charged Pions from W ± →τ ±(→ π±ντ )ντ Events in Run 2 data : CERN-EP-2021-147

Abstract Category Instrumentaions & Detectors

Primary author

Meryem Noury (Universite Hassan II, Ain Chock (MA))

Presentation materials