Jet Shapes of Isolated Photon-Tagged Jets in Pb-Pb and <i>pp</i> Collisions at √<i>S<sub>NN</sub></i>=5.02 TeV

Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Dragicevic, M, Ero, J, Del Valle, A Escalante
et al (show 2267 more authors) (2019) Jet Shapes of Isolated Photon-Tagged Jets in Pb-Pb and <i>pp</i> Collisions at √<i>S<sub>NN</sub></i>=5.02 TeV. PHYSICAL REVIEW LETTERS, 122 (15). 152001-.

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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 (p_{T}) above 1  GeV/c in annuli around the axes of jets with p_{T}^{jet}>30  GeV/c associated with an isolated photon with p_{T}^{γ}>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.

Item Type: Article
Uncontrolled Keywords: CMS Collaboration
Depositing User: Symplectic Admin
Date Deposited: 05 Dec 2019 14:59
Last Modified: 13 Oct 2023 19:09
DOI: 10.1103/PhysRevLett.122.152001
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