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Measurement of transverse momentum relative to dijet systems in PbPb and pp collisions at $ s_NN=2.76 $ TeV

Measurement of transverse momentum relative to dijet systems in PbPb and pp collisions at $ s_NN=2.76 $ TeV
Measurement of transverse momentum relative to dijet systems in PbPb and pp collisions at $ s_NN=2.76 $ TeV
An analysis of dijet events in PbPb and pp collisions is performed to explore the properties of energy loss by partons traveling in a quark-gluon plasma. Data are collected at a nucleon-nucleon center-of-mass energy of 2.76 TeV at the LHC. The distribution of transverse momentum (pT) surrounding dijet systems is measured by selecting charged particles in different ranges of pT and at different angular cones of pseudorapidity and azimuth. The measurement is performed as a function of centrality of the PbPb collisions, the pT asymmetry of the jets in the dijet pair, and the distance parameter R used in the anti-kT jet clustering algorithm. In events with unbalanced dijets, PbPb collisions show an enhanced multiplicity in the hemisphere of the subleading jet, with the pT imbalance compensated by an excess of low-pT particles at large angles from the jet axes.
1029-8479
006
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

The CMS Collaboration (2015) Measurement of transverse momentum relative to dijet systems in PbPb and pp collisions at $ s_NN=2.76 $ TeV. Journal of High Energy Physics, 01, 006. (doi:10.1007/JHEP01(2016)006). (In Press)

Record type: Article

Abstract

An analysis of dijet events in PbPb and pp collisions is performed to explore the properties of energy loss by partons traveling in a quark-gluon plasma. Data are collected at a nucleon-nucleon center-of-mass energy of 2.76 TeV at the LHC. The distribution of transverse momentum (pT) surrounding dijet systems is measured by selecting charged particles in different ranges of pT and at different angular cones of pseudorapidity and azimuth. The measurement is performed as a function of centrality of the PbPb collisions, the pT asymmetry of the jets in the dijet pair, and the distance parameter R used in the anti-kT jet clustering algorithm. In events with unbalanced dijets, PbPb collisions show an enhanced multiplicity in the hemisphere of the subleading jet, with the pT imbalance compensated by an excess of low-pT particles at large angles from the jet axes.

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Accepted/In Press date: 16 December 2015
Organisations: Physics & Astronomy

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Local EPrints ID: 408096
URI: http://eprints.soton.ac.uk/id/eprint/408096
ISSN: 1029-8479
PURE UUID: 80b57c2b-15cc-45e1-8f5c-cef326f8d2b7
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 11 May 2017 01:09
Last modified: 17 Dec 2019 01:44

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