Bibcode
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.; Liko, D.; Madlener, T.; Mikulec, I.; Pree, E.; Rad, N.; Rohringer, H.; Schieck, J.; Schöfbeck, R.; Spanring, M.; Spitzbart, D.; Waltenberger, W.; Wittmann, J.; Wulz, C.-E.; Zarucki, M.; Chekhovsky, V.; Mossolov, V.; Suarez Gonzalez, J.; De Wolf, E. A.; Di Croce, D.; Janssen, X.; Lauwers, J.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Abu Zeid, S.; Blekman, F.; D'Hondt, J.; De Bruyn, I.; De Clercq, J.; Deroover, K.; Flouris, G.; Lontkovskyi, D.; Lowette, S.; Marchesini, I.; Moortgat, S.; Moreels, L.; Python, Q.; Skovpen, K.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Beghin, D.; Brun, H.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Dorney, B.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Lenzi, T.; Luetic, J.; Maerschalk, T.; Marinov, A.; Seva, T.; Starling, E.; Vander Velde, C.; Vanlaer, P.; Vannerom, D.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cimmino, A.; Cornelis, T.; Dobur, D.; Fagot, A.; Gul, M.; Khvastunov, I.; Poyraz, D.; Roskas, C.; Salva, S.; Tytgat, M.; Verbeke, W.; Zaganidis, N.; Bakhshiansohi, H.; Bondu, O.; Brochet, S.; Bruno, G. et al.
Bibliographical reference
Physics Letters B, Volume 785, p. 14-39.
Advertised on:
10
2018
Citations
43
Refereed citations
36
Description
Measurements of azimuthal angle and transverse momentum (pT)
correlations of isolated photons and associated jets are reported for pp
and PbPb collisions at √{sNN } = 5.02 TeV. The data were
recorded with the CMS detector at the CERN LHC. For events containing a
leading isolated photon with pT γ > 40
GeV / c and an associated jet with pT jet > 30
GeV / c, the photon+jet azimuthal correlation and pT
imbalance in PbPb collisions are studied as functions of collision
centrality and pT γ. The results are
compared to pp 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 pT jet
/pT γ decreases significantly for PbPb data
relative to the pp reference. All models considered agree within
uncertainties with the data. The number of associated jets per photon
with pT γ > 80 GeV / c is observed to be
shifted towards lower pT jet values in central
PbPb collisions compared to pp collisions.