Jet shapes of isolated photon-tagged jets in Pb-Pb and &lt;em&gt;pp &lt;/em&gt;collisions at √&lt;em&gt;s&lt;/em&gt;&lt;sub&gt;NN&lt;/sub&gt; = 5.02 TeV

Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Caminada, L.; Deiters, K.; Erdmann, W.; Horisberger, R.; Ingram, Q.; Kaestli, H.C.; Kotlinski, D.; Langenegger, U.; Rohe, T.; Wiederkehr, S.A.; Woods, N.

doi:10.1103/PhysRevLett.122.152001

Jet shapes of isolated photon-tagged jets in Pb-Pb and pp collisions at √s_NN = 5.02 TeV

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Dragicevic M, Erö J, Escalante Del Valle A, Caminada L, Deiters K, Erdmann W, Horisberger R, Ingram Q, Kaestli HC, Kotlinski D, Langenegger U, Rohe T, Wiederkehr SA, Woods N, et al.

Citation

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., … Woods, N. (2019). Jet shapes of isolated photon-tagged jets in Pb-Pb and pp collisions at √s_NN = 5.02 TeV. Physical Review Letters, 122(15), 152001 (18 pp.). https://doi.org/10.1103/PhysRevLett.122.152001

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:27886

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^jet_T > 30 GeV/c associated with an isolated photon with p^γ_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.