Calibration of the photon spectrometer PHOS of the ALICE experiment

S. Acharya , D Adamova , G. Aglieri Rinella , Radosław Bala , M. Bonora , Alberto Castro , Sunwoong Cho , S De Craene , Kamil Deja , A. De Girolamo Del Mauro , P. Ghosh , Sakti P. Ghosh , P. Giubilato , A Gupta , F. Herrmann , Ch Hughes , Dirk Hutter , Vitalii Ivanov , P. A. Jacobs , M Bee Jin Low , Evan P.C Jones , D.J Kim , Jung-wook Kim , Jung-wook Kim , Jung-wook Kim , Jung-wook Kim , SS. Kumar , S. Lee , N. Martin , Mònica Martinez , H. Murakami , Julian Myrcha , Francisca A. e Silva , Jakub Siemek, Prof. dr hab. inż. czł. PAN , J. Rak , Przemysław Rokita , Md. Shahjahan K. A. Sarkar , J. Schambach , C. Schmidt , M Schmidt , Ilya Selyuzhenkov , J. Song , F Sozzi , Alberica Toia , S. Tripathy , Tomasz Trzciński , Chien-Ming Wang , Jaap Wessels , S. Yang , Z. Yin , Hiroshi Yokoyama , Zeyu Zhou , Jiang Zhu , Łukasz Graczykowski , Małgorzata Janik , Adam Kisiel , Janusz Oleniacz , Jan Pluta , Krystian Rosłon , Hanna Zbroszczyk , Monika Jakubowska , Sunita Saha

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 σmπ0 = 4.56 ± 0.03 MeV/c2 and σmη = 15.3 ± 1.0 MeV/c2, respectively.
Collective authorThe ALICE Collaboration
Author S. Acharya - [Variable Energy Cyclotron Centre India]
S. Acharya,,
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, D Adamova - [Nuclear Physics Institute of the Czech Academy of Sciences]
D Adamova,,
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, G. Aglieri Rinella - [European Organization for Nuclear Research (CERN)]
G. Aglieri Rinella,,
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- European Organization for Nuclear Research
, Radosław Bala
Radosław Bala,,
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, M. Bonora - [European Organization for Nuclear Research (CERN)]
M. Bonora,,
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- European Organization for Nuclear Research
, Alberto Castro - [University of Tennessee, Knoxville]
Alberto Castro,,
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, Sunwoong Cho - [Inha University, Incheon]
Sunwoong Cho,,
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, S De Craene
S De Craene,,
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, Kamil Deja (FEIT / ICS)
Kamil Deja,,
- The Institute of Computer Science
, A. De Girolamo Del Mauro
A. De Girolamo Del Mauro,,
-
et al.`
Total number of authors1027
Journal seriesJournal of Instrumentation, ISSN 1748-0221
Issue year2019
Vol14
No05
Pages1-31
Publication size in sheets1.5
Keywords in Englishcalorimeters, detector alignment and calibration methods (lasers, sources, particle-beams)
ASJC Classification2610 Mathematical Physics; 3105 Instrumentation
DOIDOI:10.1088/1748-0221/14/05/P05025
URL https://doi.org/10.1088/1748-0221/14/05/P05025
Languageen angielski
File
Acharya_2019_J._Inst._14_P05025.pdf 5.01 MB
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 30-07-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus Citations = 1; GS Citations = 1.0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.934; WoS Impact Factor: 2018 = 1.366 (2) - 2018=1.314 (5)
Citation count*1 (2020-07-16)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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