Jet Shapes of Isolated Photon-Tagged Jets in Pb-Pb and pp Collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV
(2019) Physical Review Letters — Vol. 122, p. 152001 (2019)
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- Abstract
- The modification of jet shapes in PbPb 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 ($p_{\mathrm{T}}$) above 1 GeV$/c$ in annuli around the axes of jets with $p_{\mathrm{T}} \gt 30$ GeV$/c$ associated with an isolated photon with $p_{\mathrm{T}} \gt 60$ GeV$/c$. The jet shape distributions are consistent between peripheral PbPb and pp collisions, but are modified for more central PbPb collisions. In these events, a larger fraction of the jet momentum is observed at larger distances from the jet axis, reflecting the interaction between the partonic medium created in heavy ion collisions and the traversing partons.
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Citations
Bakhshiansohi, H., Bondu, O., Brochet, S., Bruno, G., Caputo, C., David, P., Delaere, C., Delcourt, M., Giammanco, A., Krintiras, G., Lemaitre, V., Magitteri, A., Mertens, A., Musich, M., Piotrzkowski, K., Saggio, A., Vidal Marono, M., Wertz, S., Zobec, J., et al. (2019). Jet Shapes of Isolated Photon-Tagged Jets in Pb-Pb and pp Collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV. Physical Review Letters, 122, 152001. https://doi.org/10.1103/PhysRevLett.122.152001 (Original work published 2019)