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Study of jet quenching with isolated-photon+jet correlations in PbPb and pp collisions at √sNN = 5.02 TeV

CMS Collaboration; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Grossmann, J.; Hrubec, J.; Jeitler, M.; König, A.; Krammer, N.; Krätschmer, I.; ... mehr

Abstract:
Measurements of azimuthal angle and transverse momentum ( ) correlations of isolated photons and associated jets are reported for and PbPb collisions at . The data were recorded with the CMS detector at the CERN LHC. For events containing a leading isolated photon with and an associated jet with , the photon+jet azimuthal correlation and imbalance in PbPb collisions are studied as functions of collision centrality and . The results are compared to reference data collected at the same collision energy and to predictions from several theoretical models for parton energy loss. No evidence of broadening of the photon+jet azimuthal correlations is observed, while the ratio decreases significantly for PbPb data relative to the reference. All models considered agree within uncertainties with the data. The number of associated jets per photon with is observed to be shifted towards lower values in central PbPb collisions compared to collisions.

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Verlagsausgabe §
DOI: 10.5445/IR/1000086208
Veröffentlicht am 05.10.2018
Originalveröffentlichung
DOI: 10.1016/j.physletb.2018.07.061
Scopus
Zitationen: 20
Web of Science
Zitationen: 15
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.2018
Sprache Englisch
Identifikator ISSN: 0370-2693
urn:nbn:de:swb:90-862085
KITopen-ID: 1000086208
Erschienen in Physics letters / B
Verlag North-Holland
Band 785
Seiten 14–39
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Schlagwörter CMS; Heavy ion; Physics; Photon; Jet; Jet quenching
Nachgewiesen in Web of Science
Scopus
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