Calibration of the photon spectrometer PHOS of the ALICE experiment

0505685 - ÚJF 2020 RIV GB eng J - Journal Article
Acharya, S. - Acosta, F. T. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Křížková Gajdošová, K. - Horák, D. - Křížek, Filip - Kučera, Vít - Kushpil, Svetlana - Lavička, R. - Mareš, Jiří A. - Petráček, V. - Šafařík, K. - Šumbera, Michal - Závada, Petr … Total 1017 authors
Calibration of the photon spectrometer PHOS of the ALICE experiment.
Journal of Instrumentation. Roč. 14, č. 5 (2019), č. článku P05025. ISSN 1748-0221. E-ISSN 1748-0221
R&D Projects: GA MŠMT(CZ) LTT17018
Research Infrastructure: CERN-CZ - 90058
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : ALICE collaboration * calorimeters * detector alignment and calibration methods
OECD category: Nuclear physics; Particles and field physics (FZU-D)
Impact factor: 1.454, year: 2019
Method of publishing: Open access
https://doi.org/10.1088/1748-0221/14/05/P05025

The procedure for the energy calibration of the high granularity electromagnetic calorimeter PHOS of the ALICE experiment is presented. The methods used to perform the relative gain calibration, to evaluate the geometrical alignment and the corresponding correction of the absolute energy scale, to obtain the nonlinearity correction coefficients and finally, to calculate the time-dependent calibration corrections, are discussed and illustrated by the PHOS performance in proton-proton (pp) collisions at root s = 13 TeV. After applying all corrections, the achieved mass resolutions for pi(0) and eta mesons for p(T) > 1.7 GeV/c are sigma(pi 0)(m) = 4.56 +/- 0.03 MeV/c(2) and sigma(eta)(m) = 15.3 +/- 1.0 MeV/c(2), respectively.
Permanent Link: http://hdl.handle.net/11104/0297098