arXiv 2108.006862021-08-02hep-exnucl-ex

使用STAR检测器的Central Exclusive Production的最新结果

Recent results on Central Exclusive Production with the STAR detector

Rafal Sikora

备注：: Submission to SciPost Proceedings

摘要：

我们提出的结果，中央独家生产的带电粒子对$h^{+}h^{-}$（$h = π, K, p$），$pp\to p^\prime+h^{+}h^{-}+p^\prime$，获得与星实验在RHIC质子-质子碰撞的质心能量为$\sqrt{s} = 200$ GeV。所有的末态粒子都被重建，包括在罗马波特系统中检测到的前向散射质子。结果，选择了双坡密子交换（DPE）事件，并且有效地拒绝了非排他性背景。差分基准截面测量的功能有关的中央强子末态和前向散射质子的观测。将测得的截面与基于DPE的唯象模型预测进行比较。我们还提出了在更高的碰撞能量$\sqrt{s} = 510$ GeV相同的物理过程的测量的初步结果。这些数据表明，在$\sqrt{s} = 200$ GeV观察到的功能类似。

英文摘要：

We present results on the Central Exclusive Production of charged particle pairs $h^{+}h^{-}$ ($h = π, K, p$), $pp\to p^\prime+h^{+}h^{-}+p^\prime$, obtained with the STAR experiment at RHIC in proton-proton collisions at a center-of-mass energy of $\sqrt{s} = 200$ GeV. All final-state particles were reconstructed, including forward-scattered protons detected in the Roman Pot system. As a result, the Double Pomeron Exchange (DPE) events were selected and the non-exclusive backgrounds were efficiently rejected. Differential fiducial cross sections were measured as functions of observables related to the central hadronic final state and to the forward-scattered protons. The measured cross sections were compared to phenomenological model predictions based on the DPE. We also present preliminary results on the measurement of the same physics process at higher collision energy $\sqrt{s} = 510$ GeV. The data demonstrate features similar to those observed at $\sqrt{s} = 200$ GeV.

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。

摘要：

英文摘要：

相关论文