Correlations between jets and charged particles in PbPb and pp collisions at sNN=2.76 TeV

The CMS Collaboration

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

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−1 and 5.3 pb−1, respectively, collected at (Formula presented.) 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.[Figure not available: see fulltext.]

Original languageEnglish
Article number156
Pages (from-to)1-39
Number of pages39
JournalJournal of High Energy Physics
Volume2016
Issue number2
DOIs
Publication statusPublished - Feb 1 2016

Fingerprint

charged particles
collisions
particle collisions
normal density functions
transverse momentum
angular distribution
luminosity
quarks

Keywords

  • Heavy Ion Experiments
  • Heavy-ion collision
  • Jets
  • Particle correlations and fluctuations

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Correlations between jets and charged particles in PbPb and pp collisions at sNN=2.76 TeV. / The CMS Collaboration.

In: Journal of High Energy Physics, Vol. 2016, No. 2, 156, 01.02.2016, p. 1-39.

Research output: Contribution to journalArticle

@article{5fe00402e1a744d08742cd1523fb7375,
title = "Correlations between jets and charged particles in PbPb and pp collisions at sNN=2.76 TeV",
abstract = "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−1 and 5.3 pb−1, respectively, collected at (Formula presented.) 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.[Figure not available: see fulltext.]",
keywords = "Heavy Ion Experiments, Heavy-ion collision, Jets, Particle correlations and fluctuations",
author = "{The CMS Collaboration} and V. Khachatryan and Sirunyan, {A. M.} and A. Tumasyan and W. Adam and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, {V. M.} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and V. Kn{\"u}nz and A. K{\"o}nig and M. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and N. Rad and B. Rahbaran and H. Rohringer and J. Schieck and R. Sch{\"o}fbeck and J. Strauss and W. Treberer-Treberspurg and W. Waltenberger and G. Bencze and C. Hajd{\'u} and P. Hidas and D. Horv{\'a}th and F. Sikl{\'e}r and V. Veszpr{\'e}mi and G. Vesztergombi and N. B{\'e}ni and S. Czellar and J. Karancsi and J. Moln{\'a}r and Z. Szill{\'a}si and P. Raics and Z. Tr{\'o}cs{\'a}nyi and B. {\'U}jv{\'a}ri and G. Majumder",
year = "2016",
month = "2",
day = "1",
doi = "10.1007/JHEP02(2016)156",
language = "English",
volume = "2016",
pages = "1--39",
journal = "Journal of High Energy Physics",
issn = "1126-6708",
publisher = "Springer Verlag",
number = "2",

}

TY - JOUR

T1 - Correlations between jets and charged particles in PbPb and pp collisions at sNN=2.76 TeV

AU - The CMS Collaboration

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Knünz, V.

AU - König, A.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rad, N.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Bencze, G.

AU - Hajdú, C.

AU - Hidas, P.

AU - Horváth, D.

AU - Siklér, F.

AU - Veszprémi, V.

AU - Vesztergombi, G.

AU - Béni, N.

AU - Czellar, S.

AU - Karancsi, J.

AU - Molnár, J.

AU - Szillási, Z.

AU - Raics, P.

AU - Trócsányi, Z.

AU - Újvári, B.

AU - Majumder, G.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - 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−1 and 5.3 pb−1, respectively, collected at (Formula presented.) 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.[Figure not available: see fulltext.]

AB - 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−1 and 5.3 pb−1, respectively, collected at (Formula presented.) 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.[Figure not available: see fulltext.]

KW - Heavy Ion Experiments

KW - Heavy-ion collision

KW - Jets

KW - Particle correlations and fluctuations

UR - http://www.scopus.com/inward/record.url?scp=84959346575&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84959346575&partnerID=8YFLogxK

U2 - 10.1007/JHEP02(2016)156

DO - 10.1007/JHEP02(2016)156

M3 - Article

AN - SCOPUS:84959346575

VL - 2016

SP - 1

EP - 39

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

IS - 2

M1 - 156

ER -