Azimuthal anisotropy of charged particles at high transverse momenta in PbPb collisions at sqrt(s[NN]) = 2.76 TeV

Abstract

The azimuthal anisotropy of charged particles in PbPb collisions at nucleon-nucleon center-of-mass energy of 2.76 TeV is measured with the CMS detector at the LHC over an extended transverse momentum (pt) range up to approximately 60 GeV. The data cover both the low-pt region associated with hydrodynamic flow phenomena and the high-pt region where the anisotropies may reflect the path-length dependence of parton energy loss in the created medium. The anisotropy parameter (v2) of the particles is extracted by correlating charged tracks with respect to the event-plane reconstructed by using the energy deposited in forward-angle calorimeters. For the six bins of collision centrality studied, spanning the range of 0-60% most-central events, the observed v2 values are found to first increase with pt, reaching a maximum around pt = 3 GeV, and then to gradually decrease to almost zero, with the decline persisting up to at least pt = 40 GeV over the full centrality range measured.

Replaced with published version. Added journal reference and DOI

References in corpus (3)

• Glauber Modeling in High Energy Nuclear Collisions
• The theory and phenomenology of perturbative QCD based jet quenching
• Single and Double Photonuclear Excitations in Pb+Pb Collisions at sqrt(s_NN) = 2.76 TeV at the CERN Large Hadron Collider

Cited by in corpus (29)

• Evidence for collective multi-particle correlations in pPb collisions
• Measurement of jet fragmentation into charged particles in pp and PbPb collisions at sqrt(s[NN]) = 2.76 TeV
• Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies
• Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter
• Measurement of flow harmonics with multi-particle cumulants in Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV with the ATLAS detector
• Observation of a "Ridge" correlation structure in high multiplicity proton-proton collisions: A brief review
• Hadron spectra, flow and correlations in PbPb collisions at the LHC: interplay between soft and hard physics
• Searches for transverse momentum dependent flow vector fluctuations in Pb-Pb and p-Pb collisions at the LHC
• An overview of experimental results from ultra-relativistic heavy-ion collisions at the CERN LHC: hard probes
• Measurement of the azimuthal anisotropy of neutral pions in PbPb collisions at sqrt(s(NN)) = 2.76 TeV
• Initial state fluctuations and final state correlations: Status and open questions
• $\gamma$-hadron spectra in p + Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Collision-System and Beam-Energy Dependence of Anisotropic Flow Fluctuations
• The Role of QCD Monopoles in Jet Quenching
• Observation of flow angle and flow magnitude fluctuations in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV at the CERN Large Hadron Collider
• Non-linear flow modes of identified particles in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Updated analysis of jet quenching at RHIC and LHC within the light cone path integral approach
• Utilizing maximum likelihood estimator for flow analysis
• Jet-hadron correlations measured relative to the second order event plane in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Evidence for similar collectivity of high transverse momentum particles in pPb and PbPb collisions
• A heuristic description of high-pT hadron production in heavy ion collisions
• Calculating Jet $v_n$ and the Event Plane in the Presence of a Jet
• Systematic study of flow vector fluctuations in $\sqrt{{\text{s}}_{{}_{\mathbf{NN}}}}=5.02$ TeV Pb-Pb collisions
• Cosmology from Strong Interactions
• System-size dependence of $\gamma$-jet modifications in heavy-ion collisions
• A Large-$N$ Expansion for Minimum Bias
• Beam-energy dependence of correlations between mean transverse momentum and anisotropic flow of charged particles in Au+Au collisions at RHIC
• Review of recent results on heavy-ion physics and astroparticle physics in ALICE at the LHC
• Scaling of elliptic flow in heavy ion collisions