Study of jet Quenching With Isolated-Photon+jet Correlations in PbPb and pp Collisions at ?sNN=5.02TeV

Yükleniyor...
Küçük Resim

Tarih

2018

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Elsevier

Erişim Hakkı

Özet

Measurements of azimuthal angle and transverse momentum (pT) correlations of isolated photons and associated jets are reported for ppand PbPbcollisions at ?sNN=5.02TeV. The data were recorded with the CMS detector at the CERN LHC. For events containing a leading isolated photon with p?T>40GeV/cand an associated jet with pjetT>30GeV/c, the photon+jet azimuthal correlation and pTimbalance in PbPbcollisions are studied as functions of collision centrality and p?T. The results are compared to ppreference 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 pjetT/p?Tdecreases significantly for PbPbdata relative to the ppreference. All models considered agree within uncertainties with the data. The number of associated jets per photon with p?T>80GeV/cis observed to be shifted towards lower pjetTvalues in central PbPbcollisions compared to ppcollisions.

Açıklama

Anahtar Kelimeler

CMS, Physics, Heavy ion, Photon, Jet quenching, Jet

Kaynak

WoS Q Değeri

Q2

Scopus Q Değeri

Q1

Cilt

Sayı

Künye

Physics Letters B 785 (2018) 14–39