论文标题
在$ j/ψ$ pair不变质量谱中生产完全链接的结构
Producing fully-charm structures in the $J/ψ$-pair invariant mass spectrum
论文作者
论文摘要
最近，LHCB合作报告了在6.2和7.4 GEV之间的$ J/ψ$对不变质量谱的几种增强。在这项工作中，我们提出了动力学机制，以模仿LHCB给出的Di-$ j/ψ$质量谱的实验数据，该数据基于反应，在该反应中，由Proton-Proton碰撞直接产生的双charmonium的所有可能组合都转移到最终状态$ J/ψJ/ψJ/ψJ$中。我们发现LHCB实验数据可以很好地再现。我们进一步扩展了框架以研究一个di- $υ（1s）$系统，并在$ b \ bar {b} $ system在不变的质量上的伴侣过程的差异横截面的线形状形状，$υ（1s）υ（1s）$，这表明在$ m_ {1s）的$ m_ {1s）中可能存在$ m_（1s）的增强。 $υ（1s）$ - 配对不变质量谱。这些预测可以在LHCB和CMS中进行测试，这可能是不久的将来的潜在研究问题。
Very recently, the LHCb Collaboration reported the observation of several enhancements in the invariant mass spectrum of a $J/ψ$ pair between 6.2 and 7.4 GeV. In this work, we propose the dynamical mechanism to mimic the experimental data of a di-$J/ψ$ mass spectrum given by LHCb, which is based on the reactions, where all the possible combinations of a double charmonium directly produced by a proton-proton collision are transferred into a final state $J/ψJ/ψ$. We find that the LHCb experimental data can be well reproduced. We further extend our framework to study a di-$Υ(1S)$ system, and give the line shape of a differential cross section of a partner process in a $b\bar{b}$ system on the invariant mass of $Υ(1S)Υ(1S)$, which shows that there should exist possible enhancements near $m_{Υ(1S)Υ(1S)}=$19.0, 19.3, 19.7 GeV in the $Υ(1S)$-pair invariant mass spectrum. These predictions can be tested in LHCb and CMS, which can be as a potential research issue in near future.
