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Decomposing transverse momentum balance contributions for quenched jets in PbPb collisions at $\sqrt{^{s}NN}$ = 2.76 TeV


CMS Collaboration; Canelli, F; Caminada, L; De Cosa, A; Kilminster, B; Robmann, P; et al (2016). Decomposing transverse momentum balance contributions for quenched jets in PbPb collisions at $\sqrt{^{s}NN}$ = 2.76 TeV. Journal of High Energy Physics, 1611:55.

Abstract

Interactions between jets and the quark-gluon plasma produced in heavy ion collisions are studied via the angular distributions of summed charged-particle transverse momenta ($p_{\mathrm{T}}$) with respect to both the leading and subleading jet axes in high-$p_{\mathrm{T}}$ dijet events. The contributions of charged particles in different momentum ranges to the overall event $p_{\mathrm{T}}$ balance are decomposed into short-range jet peaks and a long-range azimuthal asymmetry in charged-particle $p_{\mathrm{T}}$. The results for PbPb collisions are compared to those in pp collisions using data collected in 2011 and 2013, at collision energy $\sqrt{s_\mathrm{NN}} =$ 2.76 TeV with integrated luminosities of 166 $\mu$b$^{-1}$ and 5.3 pb$^{-1}$, respectively, by the CMS experiment at the LHC. Measurements are presented as functions of PbPb collision centrality, charged-particle $p_{\mathrm{T}}$, relative azimuth, and radial distance from the jet axis for balanced and unbalanced dijets.

Abstract

Interactions between jets and the quark-gluon plasma produced in heavy ion collisions are studied via the angular distributions of summed charged-particle transverse momenta ($p_{\mathrm{T}}$) with respect to both the leading and subleading jet axes in high-$p_{\mathrm{T}}$ dijet events. The contributions of charged particles in different momentum ranges to the overall event $p_{\mathrm{T}}$ balance are decomposed into short-range jet peaks and a long-range azimuthal asymmetry in charged-particle $p_{\mathrm{T}}$. The results for PbPb collisions are compared to those in pp collisions using data collected in 2011 and 2013, at collision energy $\sqrt{s_\mathrm{NN}} =$ 2.76 TeV with integrated luminosities of 166 $\mu$b$^{-1}$ and 5.3 pb$^{-1}$, respectively, by the CMS experiment at the LHC. Measurements are presented as functions of PbPb collision centrality, charged-particle $p_{\mathrm{T}}$, relative azimuth, and radial distance from the jet axis for balanced and unbalanced dijets.

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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2016
Deposited On:11 Jan 2017 17:13
Last Modified:02 Feb 2018 11:20
Publisher:Springer
ISSN:1029-8479
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/JHEP11(2016)055

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