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Preprint
Report number arXiv:2407.01165 ; CERN-EP-2024-171
Title Measurement of the inclusive isolated-photon production cross section in pp collisions at s = 13 TeV
Author(s) Acharya, Shreyasi (Clermont-Ferrand U.) ; Adamova, Dagmar (Rez, Nucl. Phys. Inst.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) Vis alle 1079 forfattere
Corporate author(s) The ALICE collaboration
Publication 2024
Imprint 19 Jun 2024
Number of pages 33
Note 33 pages, 9 captioned figures, 3 tables, authors from page 27, submitted to EPJC, figures at http://alice-publications.web.cern.ch/node/11198
Subject category Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ALICE
Keywords QCD ; photon production ; experimental results
Abstract The production cross section of inclusive isolated photons has been measured by the ALICE experiment at the CERN LHC in pp collisions at centre-of-momentum energy of s=13 TeV collected during the LHC Run 2 data-taking period. The measurement is performed by combining the measurements of the electromagnetic calorimeter EMCal and the central tracking detectors ITS and TPC, covering a pseudorapidity range of |ηγ|<0.67 and a transverse momentum range of 7<pγT<200 GeV/c. The result extends to lower pγT and xγT=2pγT/s ranges, the lowest xγT of any isolated photon measurements to date, extending significantly those measured by the ATLAS and CMS experiments towards lower pγT at the same collision energy with a small overlap between the measurements. The measurement is compared with next-to-leading order perturbative QCD calculations and the results from the ATLAS and CMS experiments as well as with measurements at other collision energies. The measurement and theory prediction are in agreement with each other within the experimental and theoretical uncertainties.
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Copyright/License Preprint: © 2024 CERN (License: CC-BY-4.0)
Submitted by francesco.prino@cern.ch



 


 Element opprettet 2024-06-19, sist endret 2024-11-27


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