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 σmπjavax.xml.bind.JAXBElement@7f4fdf48 = 4.56 ± 0.03 MeV/c2 and σmη = 15.3 ± 1.0 MeV/c2, respectively.

Calibration of the photon spectrometer PHOS of the ALICE experiment

Bonomi G.;Lea R.;Pagano D.;
2019-01-01

Abstract

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 σmπjavax.xml.bind.JAXBElement@7f4fdf48 = 4.56 ± 0.03 MeV/c2 and σmη = 15.3 ± 1.0 MeV/c2, respectively.
2019
2019
Enti pubb. di ricerca ital.
PE2_1 Fundamental interactions and fileds
PE2_3 Nuclear physics
PE2_2 Particle physics
Esperti anonimi
Inglese
Internazionale
ELETTRONICO
14
5
P05025
P05025
Calorimeters; Detector alignment and calibration methods (lasers, sources, particlebeams)
Altre Istituz. pubb. estere
1023
info:eu-repo/semantics/article
262
Acharya, S.; Acosta, F. T.; Adamova, D.; Adhya, S. P.; Adler, A.; Adolfsson, J.; Aggarwal, M. M.; Rinella, G. A.; Agnello, M.; Ahammed, Z.; Ahmad, S.;...espandi
1 Contributo su Rivista::1.1 Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11379/537665
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