论文标题
BNL相对论重离子对撞机的D+AU超剂量碰撞的$ j/ψ$的光生效
Photoproduction of $J/ψ$ in d+Au ultraperipheral collisions at the BNL Relativistic Heavy Ion Collider
论文作者
论文摘要
我们认为，在动量转移$ d+au $ d+au $ ultraperipheral碰撞（UPC）中的$ j/ψ$光增生的星数据主要是探测弹性的弹性，并且可能是无用的核定型核定型核定型核定型，而在本质上是弱核定型的核定型核定型，而不是核定型弱核的核定型，并且是对预期的。分析用于选择UPC事件的Star探测器功能，我们探讨了核素 - 差异性$ J/ψ$光生源的贡献的可能性忽略很小，并且可以很好地描述对星形总横截面的$ t依赖性的很好描述。
We argue that the STAR data on $J/ψ$ photoproduction in $d+Au$ ultraperipheral collisions (UPCs) at the momentum transfer $t \neq 0$ primarily probes elastic and possibly nucleon-dissociative $J/ψ$ photoproduction on quasi-free nucleons, while being essentially insensitive to expectedly weak nuclear modifications of the gluon distribution in the deuteron. Analyzing the STAR detector capabilities for selection of UPC events, we explore the possibility that the contribution of nucleon-dissociative $J/ψ$ photoproduction is negligibly small and obtain a very good description of the $t$ dependence of the STAR total cross section.
