he 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 correc- tion 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 σπ0 m = 4.56 ± 0.03 MeV/c2 and ση m = 15.3 ± 1.0 MeV/c2, respectively.
{Calibration of the photon spectrometer PHOS of the ALICE experiment} / The ALICE collaboration, ., Acharya, S., Adamová, D., Adhya, S.P., Adler, A., Adolfsson, J., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S.U., Aiola, S., Akindinov, A., Al-Turany, M., Alam, S.N., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., et al.. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 14:05(2019). [10.1088/1748-0221/14/05/P05025]
{Calibration of the photon spectrometer PHOS of the ALICE experiment}
L. CunqueiroMembro del Collaboration Group
;
2019
Abstract
he 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 correc- tion 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 σπ0 m = 4.56 ± 0.03 MeV/c2 and ση m = 15.3 ± 1.0 MeV/c2, respectively.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.


