论文标题
部分可观测时空混沌系统的无模型预测
J/$ψ$ and $ψ$(2S) Production in Small Systems with PHENIX
论文作者
论文摘要
数十年来，抑制$ψ$（2s）核修饰因子已被视为在大型碰撞系统中最终状态效应的商标签名。在小型系统中，核修饰与统一的偏差已归因于冷核问题的影响，直到观察到$ P/d+$ a碰撞中对$ψ$（2s）状态的强差抑制，这表明存在最终状态效应。在本文中，我们介绍了$ p+p $，$ p+$ al和$ p+$ $ au碰撞系统的j/$ψ$和$ψ$（2s）的测量结果，$ \ sqrt {s _ {_ {_ {_ {nn}}}} $ = 200 GEV。关键结果包括核修饰因子$ r_ {pa} $作为中心性和速度的函数。将测量结果与阴影和传输模型预测以及LHC能量的互补测量进行了比较。
The suppression of the $ψ$(2S) nuclear modification factor has been seen as a trademark signature of final state effects in large collision systems for decades. In small systems, deviations of the nuclear modification from unity had been attributed to cold nuclear matter effects until the observation of strong differential suppression of the $ψ$(2S) state in $p/d+$A collisions, which suggests the presence of final state effects. In this paper, we present results of J/$ψ$ and $ψ$(2S) measurements in the dimuon decay channel for $p+p$, $p+$Al, and $p+$Au collision systems at $\sqrt{s_{_{NN}}}$ = 200 GeV. Key results include the nuclear modification factors $R_{pA}$ as a function of centrality and rapidity. The measurements are compared with shadowing and transport model predictions, as well as to complementary measurements at LHC energies.
