Signatures of the vortical quark-gluon plasma in hadron yields

Signatures of the vortical quark-gluon plasma in hadron yields
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强子产量中涡旋夸克-胶子等离子体的特征

DOI:
10.1103/physrevc.102.021901
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发表时间:
2020-02
期刊:
影响因子:
3.1
通讯作者:
Xu-Guang Huang
Xu-Guang Huang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hidetoshi Taya;Aaron Park;Sungtae Cho;Philipp Gubler;Koichi Hattori;Juhee Hong;Xu-Guang Huang

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本文研究了重离子碰撞中涡旋夸克胶子等离子体中强子的产生。基于夸克聚并和统计强子化模型,我们证明了总强子产额在自旋分量上的总和被具有二次依赖性的局域涡度所增强。的增强因子的金额是百分之几,并可能在目前的实验灵敏度检测。我们还表明,具有较大自旋的强子的效果更强,从而提出了一个新的签名的本地涡度,这可能是由不同的强子物种具有不同的自旋,如$\phi$和$\eta '$的产额比检测。强子产量的涡度依赖性似乎是强大的,一致的预测在这两个强子生产机制的涡度强度估计重离子碰撞的合理值。
We investigate the hadron production from the vortical quark-gluon plasma created in heavy-ion collisions. Based on the quark-coalescence and statistical hadronization models, we show that total hadron yields summed over the spin components are enhanced by the local vorticity with quadratic dependence. The enhancement factor amounts to be a few percent and may be detectable within current experimental sensitivities. We also show that the effect is stronger for hadrons with larger spin, and thus propose a new signature of the local vorticity, which may be detected by the yield ratio of distinct hadron species having different spins such as $\phi$ and $\eta'$. The vorticity dependence of hadron yields seems robust, with consistent predictions in both of the hadron production mechanisms for reasonable values of the vorticity strength estimated for heavy-ion collisions.
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