Correlations between jets and charged particles in PbPb and pp collisions at √s[subscript NN] = 2.76 TeV
Name
Correlations between.pdf
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Author(s)
Apyan, Aram
Barbieri, Richard Alexander
Baty, Austin Alan
Bierwagen, Katharina
Brandt, Stephanie Akemi
Busza, Wit
Cali, Ivan Amos
Demiragli, Zeynep
Di Matteo, Leonardo
Gomez-Ceballos, Guillelmo
Alternative Title
Correlations between jets and charged particles in PbPb and pp collisions at √sNN = 2.76 TeV
Date Issued
February 2016
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag/SISSA
Citation
The CMS collaboration et al. “Correlations between Jets and Charged Particles in PbPb and Pp Collisions at √S[subscript NN] = 2.76 TeV.” Journal of High Energy Physics 2016.2 (2016): n. pag.
Version
Final published version
Abstract
The quark-gluon plasma is studied via medium-induced changes to correlations between jets and charged particles in PbPb collisions compared to pp reference data. This analysis uses data sets from PbPb and pp collisions with integrated luminosities of 166 μb[superscript −1] and 5.3 pb[subscript −1], respectively, collected at √s[subscript NN] = 2.76 TeV. The angular distributions of charged particles are studied as a function of relative pseudorapidity (Δη) and relative azimuthal angle (Δϕ) with respect to reconstructed jet directions. Charged particles are correlated with all jets with transverse momentum (pT) above 120 GeV, and with the leading and subleading jets (the highest and second-highest in pT, respectively) in a selection of back-to-back dijet events. Modifications in PbPb data relative to pp reference data are characterized as a function of PbPb collision centrality and charged particle pT. A centrality-dependent excess of low-pT particles is present for all jets studied, and is most pronounced in the most central events. This excess of low-pT particles follows a Gaussian-like distribution around the jet axis, and extends to large relative angles of Δη ≈ 1 and Δϕ ≈ 1.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP02(2016)156
