Calibration of the photon spectrometer PHOS of the ALICE experiment

Academic Article


  • © 2019 CERN for the benefit of the Alice collaboration.. 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.
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    Author List

  • Acharya S; Acosta FT; Adamová D; Adhya SP; Adler A; Adolfsson J; Aggarwal MM; Rinella GA; Agnello M; Ahammed Z
  • Volume

  • 14
  • Issue

  • 5