Elliptic flow at large transverse momenta from quark coalescence

Abstract

We show that hadronization via quark coalescence enhances hadron elliptic flow at large pT relative to that of partons at the same transverse momentum. Therefore, compared to earlier results based on covariant parton transport theory, more moderate initial parton densities dN/dη(b=0) ~ 1500-3000 can explain the differential elliptic flow v_2(pT) data for Au+Au reactions at s^1/2=130 and 200 AGeV from RHIC. In addition, v2(pT) could saturate at about 50% higher values for baryons than for mesons. If strange quarks have weaker flow than light quarks, hadron v_2 at high pT decreases with relative strangeness content.

Minor changes, extended discussion. To appear in PRL

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• Azimuthal flow of decay photons in relativistic nuclear collisions
• The elliptic flow of multi-strange hadrons in $\sqrt{s_{NN}}$ = 200 GeV Au + Au collisions at STAR
• RHIC physics overview
• Probing the phases of QCD in ultra-relativistic nuclear collisions
• Prompt production of D mesons with ALICE at the LHC
• Correlations in the Parton Recombination Model
• Elliptic flow of identified hadrons in Au+Au collisions at $E_{lab}=35\mathrm{A}\mathrm{GeV}$ using the PHSD model
• Violation of NCQ scaling in hadron elliptic flow in Au+Au collisions at $\sqrt{s_{NN}}=3.0-7.7GeV
• The effect of quark coalescence on conical signals
• From SPS to RHIC: Maurice and the CERN heavy-ion programme
• Elliptic anisotropy of open-charm hadrons from parton scatterings in p--Pb collisions at energies available at the CERN Large Hadron Collider
• Evolution of the concept of Quark Matter: the Ianus face of the heavy ion collisions
• NCQ scaling of $f_0(980)$ elliptic flow in 200 GeV Au+Au collisions by STAR and its constituent quark content
• $J/\psi$ production and elliptic flow parameter $v_2$ at LHC energy
• Bottom quark energy loss and hadronization with B${}^{+}$ and B${}_{\mathrm{s}}^0$ nuclear modification factors using pp and PbPb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Flow Buildup in a Mixed Phase of Quark-Gluon Plasma Plus Hadrons
• Elliptical Flow in Relativistic Ion Collisions at s^(1/2)= 200 A GeV
• Impact of Baryon anti-Baryon annihilation on hyperon ($\Lambda$, $\bar{\Lambda }$) production and apparent strangeness enhancement in $\bar{\Lambda }/\bar{p}$ in heavy ion collisions at SPS energy
• Production of Strange and Charm Hadrons in Pb+Pb Collisions at $\sqrt{s_{NN}}=$ 5.02 TeV
• Impact parameter dependence of the scaling of anisotropic flows in intermediate energy HIC
• Probing bulk properties and partonic collectivity via multi-strange baryons in Au+Au collisions at top RHIC energy
• Determination of the Quark Content of Scalar Mesons Using Hydrodynamical Flow in Heavy Ion Collisions
• Elliptic flow of charged hadrons in d+Au collisions at $\sqrt{s_{NN}}=$ 200 GeV using a multi-phase transport model
• Effect of Finite Granularity of Detectors on Anisotropy Coefficients
• Studying Diquark Structure of Heavy Baryons in Relativistic Heavy Ion Collisions
• Signs of Thermalization from RHIC Experiments
• Azimuthal anisotropy measurement of multi-strange hadrons in Au+Au collision at $\sqrt{s_{NN}}$ = 27 and 54.4 GeV at STAR
• Statistical hadronization phenomenology in heavy ion collisions at SPS and RHIC energies
• Quark and Gluon Degrees of Freedom in High-Energy Heavy Ion Collisions
• Insight from the elliptic flow of identified hadrons measured in relativistic heavy-ion collisions
• Anisotropic flow of identified particles in Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV