Measurement of transverse momentum relative to dijet systems in PbPb and pp collisions at (Formula presented.) TeV

The CMS collaboration

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number6
Pages (from-to)1-52
Number of pages52
JournalJournal of High Energy Physics
Volume2016
Issue number1
DOIs
Publication statusPublished - 1 Jan 2016

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transverse momentum
collisions
hemispheres
azimuth
partons
center of mass
cones
charged particles
energy dissipation
asymmetry
quarks
energy

Keywords

  • Heavy Ions
  • Heavy-ion collision
  • Quark gluon plasma

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Measurement of transverse momentum relative to dijet systems in PbPb and pp collisions at (Formula presented.) TeV. / The CMS collaboration.

In: Journal of High Energy Physics, Vol. 2016, No. 1, 6, 01.01.2016, p. 1-52.

Research output: Contribution to journalArticle

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AB - 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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