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

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 pjetT > 30 GeV/c associated with an isolated photon with p?T > 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.

Other publications of the same journal or congress with authors from the University of Cantabria

 Fuente: Phys. Rev. Lett. 122, 152001 (2019)

 Publisher: American Physical Society

 Publication date: 01/04/2019

 No. of pages: 18

 Publication type: Article

 DOI: 10.1103/PhysRevLett.122.152001

 ISSN: 0031-9007,1079-7114

 Publication Url: https://doi.org/10.1103/PhysRevLett.122.152001