Jet Shapes of Isolated Photon-Tagged Jets in Pb-Pb and pp Collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV - INSPIRE

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Jet Shapes of Isolated Photon-Tagged Jets in Pb-Pb and pp Collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV

CMS

Collaboration

Sep 23, 2018

18 pages

Published in:

Phys.Rev.Lett. 122 (2019) 15, 152001

Published: Apr 18, 2019

e-Print:

1809.08602 [hep-ex]

DOI:

10.1103/PhysRevLett.122.152001

Report number:

CMS-HIN-18-006,
CERN-EP-2018-249

Experiments:

CERN-LHC-CMS

View in:

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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.

Note:

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-18-006 (CMS Public Pages) •
Submitted to Phys.Rev.Lett.

Elementary Particles and Fields
heavy ion: scattering
lead
parton: showers
quantum chromodynamics: matter
p p: scattering
jet: hadroproduction
photon: associated production
nuclear matter: effect
CERN LHC Coll

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