Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at $\sqrt{s_{\mathrm{NN}}}=5.02\text{TeV}$ with ATLAS at the LHC

Journal Article · 22 January 2019 · Nuclear Physics. A

DOI: https://doi.org/10.1016/j.nuclphysa.2018.09.021 · OSTI ID:1503099

Puri, Akshat  ^[1]

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1. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)

Studies of the fragmentation of jets into charged particles in heavy-ion collisions can help in understanding the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. These proceedings present a measurement of the angular distribution of charged particles around the jet axis in √^sNN = 5.02 TeV Pb+Pb and pp collisions, done using the ATLAS detector at the LHC. The measurement is performed inside jets reconstructed with the anti-kt algorithm with radius parameter R = 0.4, and is extended to regions outside the jet cone. Here the results are presented as a function of Pb+Pb collision centrality, and both jet and charged-particle transverse momenta.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC)
• Contributing Organization: ATLAS Collaboration
• Grant/Contract Number: AC02-76SF00515; AC02-05CH11231
• OSTI ID: 1503099
• Alternate ID(s): OSTI ID: 1581330
• Journal Information: Nuclear Physics. A, Vol. 982, Issue C; ISSN 0375-9474
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English