Study of jet quenching with Z+jet correlations in PbPb and pp collisions at sqrt(s[NN]) = 5.02 TeV

Abstract

The production of jets in association with Z bosons, reconstructed via the mu+mu- and e+e- decay channels, is studied in pp and, for the first time, in PbPb 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 PbPb collisions were analyzed in the 0-30% centrality range. The back-to-back azimuthal alignment was studied in both pp and PbPb collisions for Z bosons with transverse momentum p[tz] > 60 GeV/c and a recoiling jet with p[tj] > 30 GeV/c. The pt imbalance, x[jz] = p[tj] / p[tz], as well as the average number of jet partners per Z, R[jz], were studied in intervals of p[tz], in both pp and PbPb collisions. The R[jz] is found to be smaller in PbPb than in pp collisions, which suggests that in PbPb collisions a larger fraction of partons, associated with the Z bosons, lose energy and fall below the 30 GeV/c p[tj] threshold.

Replaced with the published version. Added the journal reference and DOI. All the figures and tables, including additional supplemental figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-15-013

References in corpus (13)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Pileup subtraction using jet areas
• The CMS trigger system
• Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• Direct observation of dijets in central Au+Au collisions at sqrt(s_NN) = 200 GeV
• Studies of jet quenching using isolated-photon + jet correlations in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV
• Measurement of jet suppression in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Transverse momentum and centrality dependence of dihadron correlations in Au+Au collisions at sqrt(s_NN)=200 GeV: Jet-quenching and the response of partonic matter
• The physics of $Z^0/{\gamma }^{\ast }$-tagged jets at the LHC
• Jet Reconstruction in Heavy Ion Collisions
• Vector boson-tagged jet production in heavy ion collisions at the LHC
• Simulating V+jet processes in heavy ion collisions with JEWEL

Cited by in corpus (51)

• Review of Jet Measurements in Heavy Ion Collisions
• The Angantyr model for Heavy-Ion Collisions in PYTHIA8
• Heavy quarks and jets as probes of the QGP
• Jet quenching and medium response in high-energy heavy-ion collisions: a review
• Exploration of jet substructure using iterative declustering in pp and Pb-Pb collisions at LHC energies
• Probing the time structure of the quark-gluon plasma with top quarks
• First measurement of large area jet transverse momentum spectra in heavy-ion collisions
• Study of jet quenching with isolated-photon+jet correlations in PbPb and pp collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$ 5.02 TeV
• Quark branching in QCD matter to any order in opacity beyond the soft gluon emission limit
• Inverting the mass hierarchy of jet quenching effects with prompt $b$-jet substructure
• Observation of medium induced modifications of jet fragmentation in PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV using isolated-photon-tagged jets
• Jet shapes of isolated photon-tagged jets in PbPb and pp collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Z+jet correlation with NLO-matched parton-shower and jet-medium interaction in high-energy nuclear collisions
• Recoil-free azimuthal angle for precision boson-jet correlation
• Sorting out quenched jets
• Nuclear modification factors for jet fragmentation
• Disentangling Jet Modification in Jet Simulations and in Z+Jet Data
• Evolution of the Mean Jet Shape and Dijet Asymmetry Distribution of an Ensemble of Holographic Jets in Strongly Coupled Plasma
• Measurement of substructure-dependent jet suppression in Pb+Pb collisions at 5.02 TeV with the ATLAS detector
• Jet charge modification in dense QCD matter
• Medium-induced modification of $Z$-tagged charged particle yields in Pb+Pb collisions at 5.02 TeV with the ATLAS detector
• Soft modifications to jet fragmentation in high energy proton-proton collisions
• Medium modifications of girth distributions for inclusive jets and $Z^0+\mathrm{jet}$ in relativistic heavy-ion collisions at the LHC
• Heavy-Flavour Jets in High-Energy Nuclear Collisions
• Flavor dependence of jet quenching in heavy-ion collisions from a Bayesian analysis
• First measurements of $N$-subjettiness in central Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• On the breaking of Casimir scaling in jet quenching
• Probing the in-medium $P_T$-broadening by $\gamma$+HF angular de-correlations
• Measurement of jet-medium interactions via direct photon-hadron correlations in Au$+$Au and $d$$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• $p_T$ dispersion of inclusive jets in high-energy nuclear collisions
• $Z^0$ boson associated b-jet production in high-energy nuclear collisions
• Jet quenching and effects of non-Gaussian transverse-momentum broadening on di-jet observables
• Production and hadronic decays of Higgs bosons in heavy ion collisions
• Probing Jet Medium Interactions via $Z$($H$)+jet Momentum Imbalances
• Performance of CMS muon reconstruction from proton-proton to heavy ion collisions
• Measurement of medium-induced acoplanarity in central Au-Au and pp collisions at $\sqrt{s_{\mathrm{NN}}}=200$ GeV using direct-photon+jet and ${\pi }^0$+jet correlations
• Advances in Multi-Variate Analysis Methods for New Physics Searches at the Large Hadron Collider
• Quenching of jets tagged with $W$ bosons in high-energy nuclear collisions
• Z+jet productions in heavy-ion collisions
• Jet Production at RHIC and LHC
• Hadron productions and jet substructures associated with $Z^0/\gamma$ in Pb+Pb collisions at the LHC
• PISTA: Posterior Ion STAcking
• The Fox-Wolfram Moment of Jet Production in Relativistic Heavy Ion Collisions
• Quantifying the Jet Energy Loss in Pb+Pb collisions at LHC
• Jet modifications from colour rope formation in dense systems of non-parallel strings
• Quenching of vector boson-tagged jets at the LHC
• Studying the QGP with Jets at the LHC and RHIC
• Vector boson tagged jets and jet substructure
• Jet substructure of light and heavy flavor jets at RHIC
• Emergence of thermal recoil jets in high-energy heavy-ion collisions
• Nonperturbative factorization breaking and color entanglement effects in dihadron and direct photon-hadron angular correlations in $p$$+$$p$ and $p$$+$A collisions