Two-particle angular correlations in heavy ion collisions from a multiphase transport model

Abstract

We extend our earlier study on two-particle angular correlations in $pp$ collisions at low transverse momentum ($p_T$) to $p$-Pb, Pb-Pb and Au-Au collisions at RHIC and LHC energies. We mainly use the string melting version of a multiphase transport model with improved quark coalescence for this study. We start from the analysis of ${\pi }^{\pm }$, $K^{\pm }$ and $p$($\bar{p}$) $p_T$ and rapidity distributions at different centralities. We then focus on two-particle angular correlations in $p$-Pb collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}=5.02$ TeV and Pb-Pb collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}=2.76$ TeV. For $p$-Pb collisions, a near side depression in the angular correlation is observed for low $p_T$ proton pairs and $\Lambda$ pairs but not for pion pairs or kaon pairs, similar to our earlier finding for $pp$ collisions at $\sqrt{\mathrm{s}}=7$ TeV. This is also the case for very low multiplicity Pb-Pb and Au-Au collisions. We also find that parton interactions and the improved quark coalescence are mainly responsible for the depression feature in baryon pair angular correlations. However, no such baryon-baryon anti-correlations are observed in Pb-Pb and Au-Au collisions at higher multiplicities. Therefore our results suggest that low $p_T$ baryon-baryon angular anti-correlations have a strong multiplicity dependence.

10 pages, 15 figures, submit for publication

References in corpus (27)

• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration
• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• The PHOBOS Perspective on Discoveries at RHIC
• A Multi-Phase Transport Model for Relativistic Heavy Ion Collisions
• Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions at the LHC
• Centrality dependence of $\pi$, K, p production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Formation of superdense hadronic matter in high energy heavy-ion collisions
• ZPC 1.0.1: a parton cascade for ultrarelativistic heavy ion collisions
• Multiplicity Dependence of Pion, Kaon, Proton and Lambda Production in p-Pb Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Partonic effects on the elliptic flow at relativistic heavy ion collisions
• Creating small circular, elliptical, and triangular droplets of quark-gluon plasma
• High transverse momentum triggered correlations over a large pseudorapidity acceptance in Au+Au collisions at sqrt(s_NN)=200 GeV
• Novel Collective Phenomena in High-Energy Proton-Proton and Proton-Nucleus Collisions
• Measurement of long-range angular correlation and quadrupole anisotropy of pions and (anti)protons in central $d$$+$Au collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV
• Long-range and short-range dihadron angular correlations in central PbPb collisions at a nucleon-nucleon center of mass energy of 2.76 TeV
• Antinuclei in Heavy-Ion Collisions
• Evolution of transverse flow and effective temperatures in the parton phase from a multi-phase transport model
• Measurements of long-range azimuthal anisotropies and associated Fourier coefficients for $pp$ collisions at $\sqrt{s}=5.02$ and $13$ TeV and $p$+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ATLAS detector
• Long-range pseudorapidity dihadron correlations in $d$+Au collisions at $\sqrt{s_{\mathrm{NN}}}=200$ GeV
• Hierarchy of azimuthal anisotropy harmonics in collisions of small systems from the Color Glass Condensate
• Predictions for $\sqrt{s_{NN}}=5.02$ TeV Pb+Pb Collisions from a Multi-Phase Transport Model
• Improved Quark Coalescence for a Multi-Phase Transport Model
• Measurement of long-range angular correlations and azimuthal anisotropies in high-multiplicity $p$$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at $\sqrt{s}=7$ TeV
• Parton Distributions at Hadronization from Bulk Dense Matter Produced at RHIC
• Two-particle angular correlations in pp and p-Pb collisions at LHC energies from a multi-phase transport model

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