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Jet Shapes of Isolated Photon-Tagged Jets in Pb-Pb and pp Collisions at sNN =5.02 TeV

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2019
PhysRevLett.122.152001.pdf (367.6Kb)
Authors
Sirunyan, A M
Tumasyan, A
Adam, W
Ambrogi, F
Adžić, Petar
Ćirković, Predrag
Devetak, Damir
Đorđević, Miloš
Milošević, Jovan
Contributors
CMS Collaboration
CMS Collaboration (ukupan broj autora: 2293)
Article (Published version)
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© 2019, The Author(s)
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Abstract
The modification of jet shapes in Pb-Pb collisions, relative to those in pp collisions, is studied for jets associated with an isolated photon. The data were collected with the CMS detector at the LHC at a nucleon-nucleon center-of-mass energy of 5.02 TeV. Jet shapes are constructed from charged particles with track transverse momenta (pT) above 1 GeV/c in annuli around the axes of jets with pTjet>30 GeV/c associated with an isolated photon with pTγ>60 GeV/c. The jet shape distributions are consistent between peripheral Pb-Pb and pp collisions, but are modified for more central Pb-Pb collisions. In these central Pb-Pb events, a larger fraction of the jet momentum is observed at larger distances from the jet axis compared to pp, reflecting the interaction between the partonic medium created in heavy ion collisions and the traversing partons. © 2019 CERN. © 2019 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org.../licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 .

Source:
Physical Review Letters, 2019, 122, 15

DOI: 10.1103/PhysRevLett.122.152001

ISSN: 0031-9007; 1079-7114

PubMed: 31050516

WoS: 000465181700001

Scopus: 2-s2.0-85065581660
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http://vinar.vin.bg.ac.rs/handle/123456789/8193
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