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arXiv 1801.01677hep-phnucl-th
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高能核碰撞中的光生$ψ(2S)$

$ψ(2S)$ photoproduction in high energy nuclear collisions

Baoyi Chen, Carsten Greiner, Wei Shi, Wangmei Zha, Pengfei Zhuang

摘要:

我们研究了高能核碰撞中$ψ'$的相干光生及其抑制。热介质对粲偶素光生的影响是由火球大小与核大小的竞争控制的。当前者小于后者时,光生产仅受热介质的轻微影响。计算了LHC能区半中心Pb-Pb碰撞中$ψ'$与$J/ψ$的产额比,当$p_T$高限以火球为特征时,光生作用仍能使其在低限$p_T$中的产额比显著提高.

英文摘要:

We study coherent photoproduction of $ψ'$ and the subsequent suppression in high energy nuclear collisions. The hot medium effect on charmonium photoproduction is controlled by the competition between the fireball size and nuclear size. When the former is smaller than the later, the photoproduction is only slightly affected by the hot medium. We calculate the yield ratio of $ψ'$ to $J/ψ$ in semi-central Pb-Pb collisions at LHC energy, while the high $p_T$ limit is characterized by the fireball, its value in low $p_T$ limit can still reach the significant enhancement by photoproduction.

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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