The production of isolated photons in PbPb and pp collisions at √sNN = 5.02 TeV

The CMS collaboration

doi:10.1007/JHEP07(2020)116

The production of isolated photons in PbPb and pp collisions at √sNN = 5.02 TeV

The CMS collaboration

European Organization for Nuclear Research
Yerevan Physics Institute
Institut für Hochenergiephysik
Vienna University of Technology
Institute for Nuclear Problems of Belarusian State University
University of Antwerp
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Vrjie Universiteit Brussel
c/o DESY
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Ghent University
Université Paris-Saclay
University of Louvain
Centro Brasileiro de Pesquisas Fisicas
Rua São Francisco de Xavier
University of Campinas (UNICAMP)
Universidade Federal do Rio Grande do Sul
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São Paulo State University
Federal University of ABC (UFABC)
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
University of Sofia
Beihang University
Tsinghua University
Institute of High Energy Physics, Chinese Academy of Sciences
University of Chinese Academy of Sciences
State Key Laboratory of Nuclear Physics and Technology
Zhejiang University
Universidad de Los Andes, Colombia
Universidad de Antioquia
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split
Faculty of Science, University of Split
Ruđer Bošković Institute
Institute for Theoretical and Experimental Physics
University of Cyprus
Charles University
Joint Institute for Nuclear Research, Dubna
Escuela Politecnica Nacional
Universidad San Francisco de Quito
Egyptian Network of High Energy Physics
Zewail City of Science and Technology
British University in Egypt
Ain Shams University
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
Helsinki Institute of Physics
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Purdue University
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University of Ioannina
Eötvös Loránd University
University of Debrecen
Wigner Research Centre for Physics
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Indian Institute of Science
National Institute of Science Education and Research
IIT Bhubaneswar
Institute of Physics Bhubaneswar
Panjab University
G.H.G. Khalsa College
University of Delhi
Saha Institute of Nuclear Physics
Shoolini University
University of Hyderabad
University of Visva-Bharati
Indian Institute of Technology Madras
Bhabha Atomic Research Centre
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University College Dublin
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ENEA Climate Modeling and Impacts
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Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
University of Florence
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University of Milano-Bicocca
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University of Florida
Imperial College London
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P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Moscow State University
CCLRC Rutherford Appleton Laboratory
University of Southampton
Università di Trento
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Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Kurchatov Institute
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University of Belgrade
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Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

The transverse energy (ETγ) spectra of photons isolated from other particles are measured using proton-proton (pp) and lead-lead (PbPb) collisions at the LHC at sNN = 5.02 TeV with integrated luminosities of 27.4 pb⁻¹ and 404 μb⁻¹ for pp and PbPb data, respectively. The results are presented for photons with 25 <ETγ< 200 GeV in the pseudorapidity range |η| < 1.44, and for different centrality intervals for PbPb collisions. Photon production in PbPb collisions is consistent with that in pp collisions scaled by the number of binary nucleon-nucleon collisions, demonstrating that photons do not interact with the quark-gluon plasma. Therefore, isolated photons can provide information about the initial energy of the associated parton in photon+jet measurements. The results are compared with predictions from the next-to-leading-order jetphox generator for different parton distribution functions (PDFs) and nuclear PDFs (nPDFs). The comparisons can help to constrain the nPDFs global fits. [Figure not available: see fulltext.]

langue originale	Anglais
Numéro d'article	116
journal	Journal of High Energy Physics
Volume	2020
Numéro de publication	7
Les DOIs	https://doi.org/10.1007/JHEP07(2020)116
état	Publié - 1 juil. 2020

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10.1007/JHEP07(2020)116

Contient cette citation

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title = "The production of isolated photons in PbPb and pp collisions at √sNN = 5.02 TeV",

abstract = "The transverse energy (ETγ) spectra of photons isolated from other particles are measured using proton-proton (pp) and lead-lead (PbPb) collisions at the LHC at sNN = 5.02 TeV with integrated luminosities of 27.4 pb−1 and 404 μb−1 for pp and PbPb data, respectively. The results are presented for photons with 25 ",

keywords = "Hadron-Hadron scattering (experiments), Heavy-ion collision, Photon production",

author = "\{The CMS collaboration\} and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and F. Ambrogi and T. Bergauer and M. Dragicevic and J. Er{\"o} and \{Escalante Del Valle\}, A. and M. Flechl and R. Fr{\"u}hwirth and M. Jeitler and N. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Madlener and I. Mikulec and N. Rad and J. Schieck and R. Sch{\"o}fbeck and M. Spanring and W. Waltenberger and Wulz, \{C. E.\} and M. Zarucki and V. Drugakov and V. Mossolov and \{Suarez Gonzalez\}, J. and Darwish, \{M. R.\} and \{De Wolf\}, \{E. A.\} and \{Di Croce\}, D. and X. Janssen and T. Kello and A. Lelek and M. Pieters and \{Rejeb Sfar\}, H. and \{Van Haevermaet\}, H. and \{Van Mechelen\}, P. and \{Van Putte\}, S. and \{Van Remortel\}, N. and F. Blekman and Bols, \{E. S.\} and F. Beaudette and \{Granier de Cassagnac\}, R. and M. Nguyen and C. Ochando and P. Paganini and R. Salerno and A. Zabi and A. Zghiche and \{De Wit\}, A. and A. Cappati",

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doi = "10.1007/JHEP07(2020)116",

language = "English",

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AU - Adam, W.

AU - Ambrogi, F.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Escalante Del Valle, A.

AU - Flechl, M.

AU - Frühwirth, R.

AU - Jeitler, M.

AU - Krammer, N.

AU - Krätschmer, I.

AU - Liko, D.

AU - Madlener, T.

AU - Mikulec, I.

AU - Rad, N.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Spanring, M.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Zarucki, M.

AU - Drugakov, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - Darwish, M. R.

AU - De Wolf, E. A.

AU - Di Croce, D.

AU - Janssen, X.

AU - Kello, T.

AU - Lelek, A.

AU - Pieters, M.

AU - Rejeb Sfar, H.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Putte, S.

AU - Van Remortel, N.

AU - Blekman, F.

AU - Bols, E. S.

AU - Beaudette, F.

AU - Granier de Cassagnac, R.

AU - Nguyen, M.

AU - Ochando, C.

AU - Paganini, P.

AU - Salerno, R.

AU - Zabi, A.

AU - Zghiche, A.

AU - De Wit, A.

AU - Cappati, A.

PY - 2020/7/1

Y1 - 2020/7/1

N2 - The transverse energy (ETγ) spectra of photons isolated from other particles are measured using proton-proton (pp) and lead-lead (PbPb) collisions at the LHC at sNN = 5.02 TeV with integrated luminosities of 27.4 pb−1 and 404 μb−1 for pp and PbPb data, respectively. The results are presented for photons with 25

AB - The transverse energy (ETγ) spectra of photons isolated from other particles are measured using proton-proton (pp) and lead-lead (PbPb) collisions at the LHC at sNN = 5.02 TeV with integrated luminosities of 27.4 pb−1 and 404 μb−1 for pp and PbPb data, respectively. The results are presented for photons with 25

KW - Hadron-Hadron scattering (experiments)

KW - Heavy-ion collision

KW - Photon production

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DO - 10.1007/JHEP07(2020)116

M3 - Article

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SN - 1126-6708

VL - 2020

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 7

M1 - 116

ER -

The production of isolated photons in PbPb and pp collisions at √sNN = 5.02 TeV

Résumé

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