Elliptic flow in Au+Au collisions at sqrt(s-NN) = 130 GeV
Elliptic flow in Au+Au collisions at sqrt(s-NN) = 130 GeV
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DOI：
10.17877/de290r-11998
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发表时间：
2000-09
影响因子：
8.6
通讯作者：
K. Ackermann;N. Adams;C. Adler
中科院分区：
文献类型：
--
作者：
K. Ackermann;N. Adams;C. Adler
核碰撞产生的椭圆流是一种对系统演化早期阶段敏感的强子观测。本文首次报道了在RHIC上利用星星TPC在sqrt（s_NN）=130 GeV的Au+Au碰撞中的中快度带电粒子椭圆流的结果。椭圆流信号，v_2，平均横向动量，达到约6%的值，相对外围的碰撞和更中心的碰撞减少。这可以解释为观察到的热化程度高于较低的碰撞能量。并给出了椭圆流的赝快度和横向动量依赖关系。
Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at sqrt(s_NN)=130 GeV using the STAR TPC at RHIC. The elliptic flow signal, v_2, averaged over transverse momentum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the observation of a higher degree of thermalization than at lower collision energies. Pseudorapidity and transverse momentum dependence of elliptic flow are also presented.