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arXiv 0803.2407nucl-ex
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158 A GeV/c Pb-Au碰撞中横动量关联的尺度依赖性

Scale-dependence of transverse momentum correlations in Pb-Au collisions at 158A GeV/c

D. Adamova

摘要:

本文报道了在超级质子同步加速器上进行的158 $A$/ $c$ GeV的Pb-Au碰撞中产生的带电粒子对的横向动量关联。研究了横向动量关联随碰撞中心度、粒子对角距、横向动量和电荷符号的变化。我们表明,结果与以前的研究结果在尺度无关的分析在相同的光束能量。采用两粒子动量相关器$<Δp_{t,i}, Δp_{t,j}>$和累积$p_t$变量$x(p_t)$,我们确定,使用本文提出的尺度相关的方法,不同的来源有助于测量的相关性,如量子和库仑关联,椭圆流和微型射流破碎。

英文摘要:

We present results on transverse momentum correlations of charged particle pairs produced in Pb-Au collisions at 158$A$ GeV/$c$ at the Super Proton Synchrotron. The transverse momentum correlations have been studied as a function of collision centrality, angular separation of the particle pairs, transverse momentum and charge sign. We demonstrate that the results are in agreement with previous findings in scale-independent analyses at the same beam energy. Employing the two-particle momentum correlator $<Δp_{t,i}, Δp_{t,j}>$ and the cumulative $p_t$ variable $x(p_t)$, we identify, using the scale-dependent approach presented in this paper, different sources contributing to the measured correlations, such as quantum and Coulomb correlations, elliptic flow and mini-jet fragmentation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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