Elliptic flow at large transverse momenta from quark coalescence.
Elliptic flow at large transverse momenta from quark coalescence.
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DOI：
10.1103/physrevlett.91.092301
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发表时间：
2003-02
影响因子：
8.6
通讯作者：
D. Molnár;S. Voloshin
中科院分区：
文献类型：
--
作者：
D. Molnár;S. Voloshin
我们发现，强子化通过夸克合并增强强子椭圆流在大p（垂直）相对于部分子在相同的横向动量。因此，与基于协变部分子输运理论的早期结果相比，更温和的初始部分子密度dN/deta（B=0）约为1500-3000可以解释BNL RHIC在sqrt[s]=130和200 A GeV下Au+Au反应的微分椭圆流v（2）（p（垂直））数据。此外，重子的v（2）（p（垂直））饱和值比介子高50%。如果奇异夸克的流比轻夸克弱，那么在高p（垂直）下强子v（2）随相对奇异度含量的增加而减小。
We show that hadronization via quark coalescence enhances hadron elliptic flow at large p(perpendicular) 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/deta(b=0) approximately 1500-3000 can explain the differential elliptic flow v(2)(p(perpendicular)) data for Au+Au reactions at sqrt[s]=130 and 200A GeV from BNL RHIC. In addition, v(2)(p(perpendicular)) 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 p(perpendicular) decreases with relative strangeness content.