Calibration of the photon spectrometer PHOS of the ALICE experiment

Acharya, S, Acosta, FT, Adamova, D, Adhya, SP, Adler, A, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Ahammed, Z
et al (show 1008 more authors) (2019) Calibration of the photon spectrometer PHOS of the ALICE experiment. JOURNAL OF INSTRUMENTATION, 14 (05). P05025-P05025.

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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 s=13 TeV. After applying all corrections, the achieved mass resolutions for π0 and η mesons for pT > 1.7 GeV/c are σmπ0 = 4.56 ± 0.03 MeV/c2 and σmη = 15.3 ± 1.0 MeV/c2, respectively.

Item Type: Article
Uncontrolled Keywords: Calorimeters, Detector alignment and calibration methods (lasers, sources, particlebeams)
Depositing User: Symplectic Admin
Date Deposited: 14 Aug 2019 09:50
Last Modified: 19 Jan 2023 00:31
DOI: 10.1088/1748-0221/14/05/P05025
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