Study of Jet Quenching With Z+jet Correlations in Pb-Pb and Pp Collisions at S Nn=5.02 Tev
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Date
2017
Authors
Karapınar, Güler
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Publisher
American Physical Society
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HYBRID
Green Open Access
Yes
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77
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34
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Abstract
The production of jets in association with Z bosons, reconstructed via the μ+μ- and e+e- decay channels, is studied in pp and, for the first time, in Pb-Pb collisions. Both data samples were collected by the CMS experiment at the LHC, at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The Pb-Pb collisions were analyzed in the 0%-30% centrality range. The back-to-back azimuthal alignment was studied in both pp and Pb-Pb collisions for Z bosons with transverse momentum pTZ>60 GeV/c and a recoiling jet with pTjet>30 GeV/c. The pT imbalance xjZ=pTjet/pTZ, as well as the average number of jet partners per Z, RjZ, was studied in intervals of pTZ. The RjZ is found to be smaller in Pb-Pb than in pp collisions, which suggests that in Pb-Pb collisions a larger fraction of partons associated with the Z bosons fall below the 30 GeV/c pTjet threshold because they lose energy.
Description
Keywords
Large Hadron Collider (LHC), Compact Muon Solenoid, Tellurium compounds, Heavy-ion collisions, Compact Muon Solenoid, Standard Model, heavy ion: scattering, 550, 5020 GeV-cms, General Physics and Astronomy, Pb-Pb collisions, HEAVY-ION COLLISIONS, Large Hadron Collider (LHC), QUARK-GLUON PLASMA, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), angular distribution, parton, Nuclear Experiment (nucl-ex), info:eu-repo/classification/ddc/530, Vanadium alloys, Nuclear Experiment, quark gluon: plasma, Multidisciplinary, 02 Physical Sciences, dimuon, CMS, Physics, ddc:530, Quark-gluon plasma, electron: decay, Lead alloys, alignment, Decay channels, CERN LHC Coll, jet: production, Average numbers, Transverse momenta, Physical Sciences, CMS Collaboration, PYTHIA, High energy physics, Experimental particle physics, LHC, CMS, Standard Model, Radiative energy-loss, PARTICLE PHYSICS, LHC, boson, p: jet, General Physics, p p: scattering, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Physics, Multidisciplinary, jet: energy resolution, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], jet: correlation, transverse momentum, 530, Center-of-mass energies, Tellurium compounds, Physics and Astronomy (all), HEAVY-ION COLLISIONS; QUARK-GLUON PLASMA; RADIATIVE ENERGY-LOSS; MATTER, High energy physics, Nucleon-nucleon, numerical calculations, ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика, Bosons, info:eu-repo/classification/ddc/550, Science & Technology, Matter, PARTICLE PHYSICS;LARGE HADRON COLLIDER;CMS, Binary alloys, RADIATIVE ENERGY-LOSS, LARGE HADRON COLLIDER, Jet quenching, Physics and Astronomy, Lead, jet: quenching, Data sample, Experimental particle physics, MATTER, experimental results
Fields of Science
01 natural sciences, 06 humanities and the arts, 0103 physical sciences, 0105 earth and related environmental sciences, 0604 arts
Citation
Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer,T., Brandstetter, J.,...CMS Collaboration (2017). Study of jet quenching with Z+jet correlations in Pb-Pb and pp collisions at s NN=5.02 TeV. Physical Review Letters, 119(8). doi:10.1103/PhysRevLett.119.082301
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Source
Physical Review Letters
Volume
119
Issue
8
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