Parton coalescence and the antiproton/pion anomaly at RHIC -: art. no. 202302

被引：589

作者：

Greco, V ^{[1
]}

Ko, CM

Lévai, P

机构：

[1] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA

[2] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA

[3] KFKI Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.90.202302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Coalescence of minijet partons with 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 momenta give 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.

引用

页数：4

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