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arXiv 2004.12520hep-ph
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在LHC下以pp、pA和AA模式产生包含性衍射$\rm η_{c}$

Inclusive diffractive $\rm η_{c}$ production in pp, pA and AA modes at the LHC

Tichouk, Hao Sun, Xuan Luo

摘要:

本文研究了LHC能区$\rm η_{c}$在质子-质子、质子-核和核-核碰撞模式下的Pomeron-Pomeron、Reggeon-Reggeon、Pomeron-Reggeon以及胶子-Pomeron(-Reggeon)和光子-Pomeron(-Reggeon)相互作用。基于NRQCD分解和Regge理论计算了截面。Pomeron Reggeon贡献的交叉交换在$\rm pp$和$\rm pA$模式中是重要的。在$\rm AA$模式下,Pomeron-Pomeron贡献是显著的。在$\rm A$经历衍射过程的单衍射过程中,Pomeron对$\rm AA$和$\rm pA$模的贡献是相当大的。Reggeon贡献在$\rm pp$和$\rm pA$模式中是相当大的,其中$\rm p$仅经历衍射过程。在光子-坡密子和-Reggeon过程中,坡密子和Reggeon的贡献仍然小于胶子-坡密子和-Reggeon过程。结果表明,在LHC上,通过选择特定的模式,可以在一定的运动学窗口内进行Reggeon、Pomeron及其交叉交换的实验研究。研究结果有助于更好地约束Reggeon和Pomeron部分子的含量。包含过程作为相关互斥过程的背景,应该预测互斥过程。

英文摘要:

In this paper, the inclusive Pomeron-Pomeron, Reggeon-Reggeon, Pomeron-Reggeon as well as gluon-Pomeron(-Reggeon) and photon-Pomeron(-Reggeon) interactions for the $\rm η_{c}$ at the LHC energies have been examined in proton-proton, proton-nucleus and nucleus-nucleus collision modes. The cross section has been computed based on the NRQCD factorization and Regge theory formalism. The cross exchange of Pomeron-Reggeon contribution is important in $\rm pp$ and $\rm pA$ modes. The Pomeron-Pomeron contribution is significant in $\rm AA$ mode. The Pomeron contribution is considerable for $\rm AA$ and $\rm pA$ modes in single diffractive process where $\rm A$ undergoes the diffractive process. Reggeon contribution is sizable in $\rm pp$ and $\rm pA$ modes where $\rm p$ only undergoes the diffractive process. The Pomeron and Reggeon contributions in photon-Pomeron and-Reggeon process remain smaller than that of gluon-Pomeron and-Reggeon processes. Our results show that the experimental study of Reggeon, Pomeron and their cross exchange can be carried out in certain kinematic windows with the specific choice of the mode at the LHC. The investigation can be useful to better constrain the Reggeon and Pomeron parton content. The inclusive process serves as the background to related exclusive processes which should be predicted.

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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