Parton coalescence and antiproton/pion anomaly at RHIC

Details Parton coalescence and antiproton/pion anomaly at RHIC Parton coalescence and antiproton/pion anomaly at RHIC

2003-01-28

arxiv.org/abs/nucl-th/0301093v2

Phys.Rev.Lett.90:202302,2003

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures, version to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.90.202302

Coalescence of minijet partons with the partons from the quark-gluon plasma formed in relativistic heavy ion collisions is suggested as the mechanism for production of hadrons with intermediate transverse momentum. The resulting enhanced antiproton and pion yields at intermediate transverse momentum gives a plausible explanation for the observed large antiproton to pion ratio. With further increasing momentum, the ratio is predicted to decrease and approach the small value given by independent fragmentations of minijet partons after their energy loss in the quark-gluon plasma.

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