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Jet momentum dependence of jet quenching in PbPb collisions at $s_NN=2.76$ TeV

Jet momentum dependence of jet quenching in PbPb collisions at $s_NN=2.76$ TeV
Jet momentum dependence of jet quenching in PbPb collisions at $s_NN=2.76$ TeV

Dijet production in PbPb collisions at a nucleon–nucleon center-of-mass energy of 2.76 TeV is studied with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 150 μb−1 is analyzed. Jets are reconstructed using combined information from tracking and calorimetry, using the anti-
kT algorithm with R=0.3. The dijet momentum balance and angular correlations are studied as a function of collision centrality and leading jet transverse momentum. For the most peripheral PbPb collisions, good agreement of the dijet momentum balance distributions with pp data and reference calculations at the same collision energy is found, while more central collisions show a strong imbalance of leading and subleading jet transverse momenta attributed to the jet-quenching effect. The dijets in central collisions are found to be more unbalanced than the reference, for leading jet transverse momenta up to the highest values studied.
0370-2693
176-197
Chatrchyan, Serguei
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Chatrchyan, Serguei
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Chatrchyan, Serguei and Belyaev, Alexander , The CMS Collaboration (2012) Jet momentum dependence of jet quenching in PbPb collisions at $s_NN=2.76$ TeV. Physics Letters B, B712, 176-197. (doi:10.1016/j.physletb.2012.04.058).

Record type: Article

Abstract


Dijet production in PbPb collisions at a nucleon–nucleon center-of-mass energy of 2.76 TeV is studied with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 150 μb−1 is analyzed. Jets are reconstructed using combined information from tracking and calorimetry, using the anti-
kT algorithm with R=0.3. The dijet momentum balance and angular correlations are studied as a function of collision centrality and leading jet transverse momentum. For the most peripheral PbPb collisions, good agreement of the dijet momentum balance distributions with pp data and reference calculations at the same collision energy is found, while more central collisions show a strong imbalance of leading and subleading jet transverse momenta attributed to the jet-quenching effect. The dijets in central collisions are found to be more unbalanced than the reference, for leading jet transverse momenta up to the highest values studied.

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Published date: 2012
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 411289
URI: https://eprints.soton.ac.uk/id/eprint/411289
ISSN: 0370-2693
PURE UUID: cec4ea76-4171-479a-8c2f-e4d17dc60246
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 16 Jun 2017 16:32
Last modified: 15 Mar 2019 01:33

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