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


CMS Collaboration; et al; Canelli, M Florencia; Chiochia, V; Kilminster, B; Robmann, P (2016). Measurement of transverse momentum relative to dijet systems in PbPb and pp collisions at √sNN =2.76TeV. Journal of High Energy Physics, 1601:1-52.

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 pseudo-rapidity 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 sub leading jet, with the pT imbalance compensated by an excess of low-pT particles at large angles from the jet axes.

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 pseudo-rapidity 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 sub leading jet, with the pT imbalance compensated by an excess of low-pT particles at large angles from the jet axes.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Nuclear and High Energy Physics
Language:English
Date:2016
Deposited On:04 Jan 2017 10:36
Last Modified:22 Aug 2021 13:51
Publisher:Springer
ISSN:1029-8479
OA Status:Gold
Publisher DOI:https://doi.org/10.1007/JHEP01(2016)006

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