Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in p+p p+Al, p+Au, and 3He+Au collisions at √s = 200 GeV
Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in p+p p+Al, p+Au, and 3He+Au collisions at √s = 200 GeV
复制标题
测量 p+p p+Al、p+Au 和 3He+Au 碰撞中 √s = 200 GeV 时向前和向后快速产生的 ψ(2S) 到 ψ(1S) 介子的相对产量
DOI：
10.1103/physrevc.95.034904
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发表时间：
2017
影响因子：
3.1
通讯作者：
T. Murakami et al.
中科院分区：
文献类型：
--
作者：
A. Adare;T. Murakami et al.
PHENIX 合作组织测量了在向前和向后的速度区间内、、和 GeV 碰撞中产生的介子产量的比率。我们发现碰撞比率与其他碰撞能量下的测量结果一致。在与原子核的碰撞中，我们发现在向前（-going或-going）方向上，介子对介子的相对产量与碰撞中测量的值一致。然而，在向后（去核）方向，主题子优先被 因子抑制。在一些模型中，这种抑制归因于弱束缚介子通过与共动粒子的终态相互作用而破裂，这些粒子在核运动方向上具有更高的密度。这些分裂效应可能与去限制的夸克-胶子等离子体中的颜色筛选竞争，以产生对夸克尼亚激发态的连续抑制。
The PHENIX Collaboration has measured the ratio of the yields oftomesons produced in,,, andcollisions atGeV over the forward and backward rapidity intervals. We find that the ratio incollisions is consistent with measurements at other collision energies. In collisions with nuclei, we find that in the forward (-going or-going) direction, the relative yield ofmesons tomesons is consistent with the value measured incollisions. However, in the backward (nucleus-going) direction, themeson is preferentially suppressed by a factor of. This suppression is attributed in some models to the breakup of the weakly boundmeson through final-state interactions with comoving particles, which have a higher density in the nucleus-going direction. These breakup effects may compete with color screening in a deconfined quark-gluon plasma to produce sequential suppression of excited quarkonia states.