DOE OSTI · 3011706
Measurement of the inclusive isolated-photon production cross section in pp collisions at $\mathbf {\sqrt{\textit{s}}=13}$ TeV
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 $\mathbf {\sqrt{\textit{s}}=13}$ 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 and a transverse momentum range of |η γ | < 0.67 and a transverse momentum range 7 < p$^{γ}_{T}$ < 200 GeV/c. The result extends to lower p$^{γ}_{T}$ and x$^{γ}_{T}$ = 2p$^{γ}_{T}$/$\sqrt{s}$ ranges, the lowest x$^{γ}_{T}$ of any isolated photon measurements to date, extending significantly those measured by the ATLAS and CMS experiments towards lower p$^{γ}_{T}$ 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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Acharya, S. [LPC] (ORCID:0000000292135329), Adamová, D. [Nuclear Physics Institute of the Czech Academy of Sciences] (ORCID:0000000205047428), Agarwal, A. [Homi Bhabha National Institute], Aglieri Rinella, G. [European Organization for Nuclear Research (CERN)] (ORCID:0000000296113696), Aglietta, L. [Dipartimento di Fisica dell’Università and Sezione INFN] (ORCID:0009000307636802), Agnello, M. [Dipartimento DISAT del Politecnico and Sezione INFN] (ORCID:0000000207605075), Agrawal, N. [Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN] (ORCID:0000000303489836), Ahammed, Z. [Homi Bhabha National Institute] (ORCID:0000000152417412), Ahmad, S. [Aligarh Muslim University] (ORCID:0000000304975705), Ahn, S. U. [Korea Institute of Science and Technology Information] (ORCID:000000018847489X), Ahuja, I. [P.J. Šafárik University] (ORCID:0000000244171392), Akindinov, A. [Affiliated with an institute covered by a cooperation agreement with CERN] (ORCID:0000000273883022), Akishina, V. [Johann Wolfgang Goethe-Universität Frankfurt], Al-Turany, M. [GSI Helmholtzzentrum für Schwerionenforschung GmbH] (ORCID:0000000280714497), Aleksandrov, D. [Affiliated with an institute covered by a cooperation agreement with CERN] (ORCID:0000000297197035), Alessandro, B. [Sezione di Torino] (ORCID:0000000196804940), Alfanda, H. M. [Central China Normal University] (ORCID:0000000256592119), Alfaro Molina, R. [Universidad Nacional Autónoma de México] (ORCID:0000000247137069), Ali, B. [Aligarh Muslim University] (ORCID:0000000208777979), Alici, A. [Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN] (ORCID:0000000336184617), Alizadehvandchali, N. [University of Houston] (ORCID:0009000073651064), Alkin, A. [Sungkyunkwan University] (ORCID:0000000222055761), Alme, J. [University of Bergen] (ORCID:0000000301770536), Alocco, G. [Dipartimento di Fisica dell’Università and Sezione INFN; Sezione di Cagliari] (ORCID:0000000189109173), Alt, T. [Johann Wolfgang Goethe-Universität Frankfurt] (ORCID:0009000548625370), Altamura, A. R. [Sezione di Bari] (ORCID:0000000180485500), Altsybeev, I. [Technische Universität München] (ORCID:0000000280797026), Alvarado, J. R. [Universidad Autónoma de Puebla] (ORCID:0000000250381337), Alvarez, C. O. R. [Universidad Autónoma de Puebla], Anaam, M. N. [Central China Normal University] (ORCID:0000000261804243), Andrei, C. [Horia Hulubei National Institute of Physics and Nuclear Engineering] (ORCID:0000000185350680), Andreou, N. [University of Derby] (ORCID:0009000974576866), Andronic, A. [Institut für Kernphysik] (ORCID:0000000223726117), Andronov, E. [Affiliated with an institute covered by a cooperation agreement with CERN] (ORCID:0000000304379292), Anguelov, V. [Ruprecht-Karls-Universität Heidelberg] (ORCID:0009000602362680), Antinori, F. [Sezione di Padova] (ORCID:0000000273668891), Antonioli, P. [Sezione di Bologna] (ORCID:0000000175163726), Apadula, N. [Lawrence Berkeley National Laboratory] (ORCID:0000000254786120), Aphecetche, L. [CNRS-IN2P3] (ORCID:0000000176623878), Appelshäuser, H. [Johann Wolfgang Goethe-Universität Frankfurt] (ORCID:0000000306147671), Arata, C. [CNRS-IN2P3] (ORCID:0009000219907289), Arcelli, S. [Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN] (ORCID:0000000163679215), Arnaldi, R. [Sezione di Torino] (ORCID:0000000166989577), Arneiro, J. G. M. C. A. [Universidade de São Paulo (USP)] (ORCID:0000000251942079), Arsene, I. C. [University of Oslo] (ORCID:0000000323169565), Arslandok, M. [Yale University] (ORCID:0000000238888303), Augustinus, A. [European Organization for Nuclear Research (CERN)] (ORCID:0009000854606805), Averbeck, R. [GSI Helmholtzzentrum für Schwerionenforschung GmbH] (ORCID:0000000342774963), Averyanov, D. [Affiliated with an institute covered by a cooperation agreement with CERN] (ORCID:0000000200274648), Azmi, M. D. [Aligarh Muslim University] (ORCID:0000000225016856), Baba, H. [University of Tokyo], Badalà, A. [Sezione di Catania] (ORCID:0000000205694828), Bae, J. [Sungkyunkwan University] (ORCID:0009000848068019), Baek, Y. W. [Gangneung-Wonju National University] (ORCID:0000000243434883), Bai, X. [University of Science and Technology of China] (ORCID:000900099085079X), Bailhache, R. [Johann Wolfgang Goethe-Universität Frankfurt] (ORCID:0000000179874592), Bailung, Y. [Indian Institute of Technology Indore] (ORCID:0000000311720225), Bala, R. [University of Jammu] (ORCID:0000000241162861), Balbino, A. [Dipartimento DISAT del Politecnico and Sezione INFN] (ORCID:0000000203591403), Baldisseri, A. [Départment de Physique Nucléaire (DPhN)] (ORCID:000000026186289X), Balis, B. [AGH University of Krakow] (ORCID:0000000230824209), Banerjee, D. [Bose Institute] (ORCID:0000000157437578), Banoo, Z. [University of Jammu] (ORCID:0000000271783001), Barbasova, V. [P.J. Šafárik University], Barile, F. [Dipartimento Interateneo di Fisica ‘M. Merlin’ and Sezione INFN] (ORCID:0000000320881290), Barioglio, L. [Sezione di Torino] (ORCID:0000000273289154), Barlou, M. [Department of Physics], Barman, B. [Department of Physics], Barnaföldi, G. G. [HUN-REN Wigner Research Centre for Physics] (ORCID:0000000192236480), Barnby, L. S. [University of Derby] (ORCID:0000000173579904), Barreau, E. [CNRS-IN2P3] (ORCID:0009000315330782), Barret, V. [LPC] (ORCID:0000000306119283), Barreto, L. [Universidade de São Paulo (USP)] (ORCID:0000000264540052), Bartels, C. [University of Liverpool] (ORCID:0009000233714483), Barth, K. [European Organization for Nuclear Research (CERN)] (ORCID:0000000176331189), Bartsch, E. [Johann Wolfgang Goethe-Universität Frankfurt] (ORCID:0009000679284203), Bastid, N. [LPC] (ORCID:0000000269058345), Basu, S. [Lund University] (ORCID:0000000306878124), Batigne, G. [CNRS-IN2P3] (ORCID:0000000186386300), Battistini, D. [Technische Universität München] (ORCID:0009000001993372), Batyunya, B. [Affiliated with an international laboratory covered by a cooperation agreement with CERN] (ORCID:0009000929746985), Bauri, D. [Indian Institute of Technology Bombay (IIT)], Alba, J. L. Bazo [Pontificia Universidad Católica del Perú] (ORCID:0000000191489101), Bearden, I. G. [University of Copenhagen] (ORCID:0000000327843094), Beattie, C. [Yale University] (ORCID:0000000174314051), Becht, P. [GSI Helmholtzzentrum für Schwerionenforschung GmbH] (ORCID:0000000279083288), Behera, D. [Indian Institute of Technology Indore] (ORCID:0000000225997957), Belikov, I. [France] (ORCID:0009000559228936), Bell Hechavarria, A. D. C. [Institut für Kernphysik] (ORCID:0000000204426549), Bellini, F. [Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN] (ORCID:0000000334984661), Bellwied, R. [University of Houston] (ORCID:0000000231560188), Belokurova, S. [Affiliated with an institute covered by a cooperation agreement with CERN] (ORCID:0000000248623384), Beltran, L. G. E. [Universidad Autónoma de Sinaloa] (ORCID:0000000294136069), Beltran, Y. A. V. [Universidad Autónoma de Puebla] (ORCID:0009000282124789), Bencedi, G. [HUN-REN Wigner Research Centre for Physics] (ORCID:0000000290405292), Bensaoula, A. [University of Houston], Beole, S. [Dipartimento di Fisica dell’Università and Sezione INFN] (ORCID:0000000346738038), Berdnikov, Y. [Affiliated with an institute covered by a cooperation agreement with CERN] (ORCID:0000000303095917), Berdnikova, A. [Ruprecht-Karls-Universität Heidelberg] (ORCID:0000000337057898), Bergmann, L. [Ruprecht-Karls-Universität Heidelberg] (ORCID:0009000455112496). 2025-01-28. Measurement of the inclusive isolated-photon production cross section in pp collisions at $\mathbf {\sqrt{\textit{s}}=13}$ TeV. https://doi.org/10.1140/epjc%2Fs10052-024-13506-x
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