Modification of jet shapes in PbPb collisions at $sqrt s_NN = 2.76$ TeV
Modification of jet shapes in PbPb collisions at $sqrt s_NN = 2.76$ TeV
The first measurement of jet shapes, defined as the fractional transverse momentum radial distribution, for inclusive jets produced in heavy-ion collisions is presented. Data samples of PbPb and pp collisions, corresponding to integrated luminosities of 150 μb−1 and 5.3 pb−1 respectively, were collected at a nucleon–nucleon centre-of-mass energy of
sNN=2.76TeV
with the CMS detector at the LHC. The jets are reconstructed with the anti-
kT
algorithm with a distance parameter
R=0.3
, and the jet shapes are measured for charged particles with transverse momentum
pT>1GeV/c
. The jet shapes measured in PbPb collisions in different collision centralities are compared to reference distributions based on the pp data. A centrality-dependent modification of the jet shapes is observed in the more central PbPb collisions, indicating a redistribution of the energy inside the jet cone. This measurement provides information about the parton shower mechanism in the hot and dense medium produced in heavy-ion collisions.
243-263
Chatrchyan, Serguei
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
2014
Chatrchyan, Serguei
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Abstract
The first measurement of jet shapes, defined as the fractional transverse momentum radial distribution, for inclusive jets produced in heavy-ion collisions is presented. Data samples of PbPb and pp collisions, corresponding to integrated luminosities of 150 μb−1 and 5.3 pb−1 respectively, were collected at a nucleon–nucleon centre-of-mass energy of
sNN=2.76TeV
with the CMS detector at the LHC. The jets are reconstructed with the anti-
kT
algorithm with a distance parameter
R=0.3
, and the jet shapes are measured for charged particles with transverse momentum
pT>1GeV/c
. The jet shapes measured in PbPb collisions in different collision centralities are compared to reference distributions based on the pp data. A centrality-dependent modification of the jet shapes is observed in the more central PbPb collisions, indicating a redistribution of the energy inside the jet cone. This measurement provides information about the parton shower mechanism in the hot and dense medium produced in heavy-ion collisions.
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Published date: 2014
Organisations:
Physics & Astronomy
Identifiers
Local EPrints ID: 411133
URI: http://eprints.soton.ac.uk/id/eprint/411133
ISSN: 0370-2693
PURE UUID: d15efffc-5a37-4130-b0be-efd20881ce50
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Date deposited: 14 Jun 2017 16:31
Last modified: 09 Jan 2022 03:25
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Contributors
Author:
Serguei Chatrchyan
Corporate Author: The CMS Collaboration
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