Meson and baryon elliptic flow at high pT from parton coalescence

Details Meson and baryon elliptic flow at high pT from parton coalescence Meson and baryon elliptic flow at high pT from parton coalescence

2003-05-18

arxiv.org/abs/nucl-th/0305049v1

J.Phys. G30 (2004) S235-S242

Physics

Nuclear Physics

Nuclear Theory

Talk at SQM2003 [7th Int. Conf. on Strangeness in Quark Matter (Atlantic Beach, NC, USA, Mar 12-17, 2003)] - 6 pages, 5 eps fi

Scientific paper

10.1088/0954-3899/30/1/027

The large and saturating differential elliptic flow v2(pT) observed in Au+Au reactions at RHIC so far could only be explained assuming an order of magnitude denser initial parton system than estimated from perturbative QCD. Hadronization via parton coalescence can resolve this ``opacity puzzle'' because it enhances hadron elliptic flow at large pT relative to that of partons at the same transverse momentum. An experimentally testable consequence of the coalescence scenario is that v2(pT) saturates at about 50% higher values for baryons than for mesons. In addition, if strange quarks have weaker flow than light quarks, hadron v2 at high pT decreases with relative strangeness content.

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