Study of jet quenching with isolated-photon+jet correlations in PbPb and pp collisions at sNN=5.02 TeV
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 pγ T >...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Elsevier BV
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/66770/ http://irep.iium.edu.my/66770/ http://irep.iium.edu.my/66770/ http://irep.iium.edu.my/66770/1/66770_Study%20of%20jet%20quenching%20with%20isolated-photon%2Bjet_article.pdf http://irep.iium.edu.my/66770/2/66770_Study%20of%20jet%20quenching%20with%20isolated-photon%2Bjet_scopus.pdf |
| Summary: | 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 pγ
T > 40 GeV/c
and an associated jet with pjet
T > 30 GeV/c, the photon+jet azimuthal correlation and pT imbalance in
PbPb collisions are studied as functions of collision centrality and pγ
T . 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 pjet
T /pγ
T 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
pγ
T > 80 GeV/c is observed to be shifted towards lower pjet
T values in central PbPb collisions compared
to pp collisions |
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