Averaged transverse momentum correlations of hadrons in relativistic heavy-ion collisions

Abstract

We compile experimental data for the averaged transverse momentum ($⟨p_T⟩$) of proton, $\Lambda$, ${\Xi }^{-}$, ${\Omega }^{-}$ and $\varphi$ at mid-rapidity in Au+Au collisions at $\sqrt{s_{NN}}=$ 200, 39, 27, 19.6, 11.5, 7.7 GeV and in Pb+Pb collisions at $\sqrt{s_{NN}}=$ 2.76 TeV, and find that experimental data of these hadrons exhibit systematic correlations. We apply a quark combination model with equal-velocity combination approximation to derive analytic formulas of hadronic $⟨p_T⟩$ in the case of exponential form of quark $p_T$ spectra at hadronization. We use them to successfully explain the systematic correlations exhibited in $⟨p_T⟩$ data of $p\Lambda$, $\Lambda {\Xi }^{-}$, ${\Xi }^{-}{\Omega }^{-}$ and ${\Xi }^{-}\varphi$ pairs. We also use them to successfully explain the regularity observed in $⟨p_T⟩$ of these hadrons as the function of $(d{N}_{ch}/dy)/(N_{part}/2)$ at mid-rapidity in central heavy-ion collisions at both RHIC and LHC energies. Our results suggest that the constituent quark degrees of freedom and the equal-velocity combination of these constituent quarks at hadronization play important role in understanding the production of baryons and $\varphi$ meson at these RHIC and LHC energies.

arXiv comment10 pages, 7 figures

References in corpus (48)

• 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
• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Glauber Modeling in High Energy Nuclear Collisions
• A Multi-Phase Transport Model for Relativistic Heavy Ion Collisions
• New Forms of QCD Matter Discovered at RHIC
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Suppression of Hadrons with Large Transverse Momentum in Central Au+Au Collisions at $sqrt {s sub {sub {NN}}}_ = 130 GeV
• Hadronization in heavy ion collisions: Recombination and fragmentation of partons
• Parton coalescence and antiproton/pion anomaly at RHIC
• Centrality dependence of $\pi$, K, p production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Centrality dependence of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Bulk Properties of the Medium Produced in Relativistic Heavy-Ion Collisions from the Beam Energy Scan Program
• A model of jet quenching in ultrarelativistic heavy ion collisions and high-pt hadron spectra at RHIC
• K${}_{\mathrm{S}}^0$ and $\mathrm{\Lambda }$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Hydrodynamic Models for Heavy Ion Collisions
• Scaling behavior at high p_T and the p/pi ratio
• Heavy Quark Energy Loss in Nuclear Medium
• Identified baryon and meson distributions at large transverse momenta from Au+Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Centrality dependence of pi^[+/-], K^[+/-], p and p-bar production from sqrt(s_NN)=130 GeV Au + Au collisions at RHIC
• Dynamics of Hot Bulk QCD Matter: from the Quark-Gluon Plasma to Hadronic Freeze-Out
• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Spectra and radial flow at RHIC with Tsallis statistics in a Blast-Wave description
• Parton transport and hadronization from the dynamical quasiparticle point of view
• Jet Quenching and Radiative Energy Loss in Dense Nuclear Matter
• Measurements of $\varphi$ meson production in relativistic heavy-ion collisions at RHIC
• Quark Coalescence and Elliptic Flow of Charm Hadrons
• Hadron spectra and elliptic flow for 200 A GeV Au+Au collisions from viscous hydrodynamics coupled to a Boltzmann cascade
• Strange baryon resonance production in $\sqrt{s_{NN}}=200$ GeV $p+p$ and $Au+Au$ collisions
• Strange hadron production in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 7.7, 11.5, 19.6, 27, and 39 GeV
• Uniform description of bulk observables in the hydrokinetic model of A+A collisions at RHIC and LHC
• $\varphi$ and $\Omega$ production in relativistic heavy ion collisions in a dynamical quark coalescence model
• Production of $\Sigma (1385{)}^{\pm }$ and $\Xi (1530{)}^0$ in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Resonance Recombination Model and Quark Distribution Functions in the Quark-Gluon Plasma
• Production of single-charm hadrons by quark combination mechanism in $p$-Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV
• Multi-strange baryon production in Au+Au collisions at top RHIC energy as a probe of bulk properties
• Quark number scaling of hadronic $p_T$ spectra and constituent quark degree of freedom in $p$-Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV
• New insights into hadron production mechanism from $p_T$ spectra in $pp$ collisions at $\sqrt{s}=7$ TeV
• Production of light flavor and single-charmed hadrons in $pp$ collisions at $\sqrt{s}=5.02$ TeV in an equal-velocity quark combination model
• Quark number scaling of $p_T$ spectra for $\Omega$ and $\varphi$ in relativistic heavy-ion collisions
• Constituent quark number scaling from strange hadron spectra in $pp$ collisions at $\sqrt{s}=$ 13 TeV
• Core-corona interplay in Pb-Pb collisions at $\sqrt{s_{NN}}$=2.76 TeV
• Elliptic flow of hadrons in equal-velocity quark combination mechanism in relativistic heavy-ion collisions
• Strange hadron production in a quark combination model in Au+Au collisions at RHIC energies
• Signals of quark combination at hadronization in $pp$ collisions at $\sqrt{s}=200$ GeV