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arXiv 2210.04518hep-phhep-exnucl-ex
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在CERN大型强子对撞机可用能量下pp碰撞中粲偶素的产生

Charmonium production in pp collisions at energies available at the CERN Large Hadron Collider

Biswarup Paul, Mahatsab Mandal, Pradip Roy, Sukalyan Chattapadhyay

摘要:

利用重夸克偶素产生的首阶非相对论量子色动力学模型,系统地研究了在大型强子对撞机(LHC)上不同能量和不同速度下p-p碰撞中J/ $ψ$和$ψ$(2S)的产生.我们考虑了高激发态衰变对J $ψ$的贡献。计算值与LHC的ALICE、ATLAS、CMS和LHCb四个实验的数据进行了比较。在ALICE的情况下,包括J/ $ψ$和$ψ$(2S)截面已被计算,包括从B介子的馈下使用固定阶次领先的对数形式。结果发现,所有的实验截面都很好地描述了$p_{\rm T} >$ 3 GeV内的理论不确定性所产生的因式分解和重整化尺度的选择。

英文摘要:

We have performed a systematic study of J/$ψ$ and $ψ$(2S) production in p--p collisions at different Large Hadron Collider (LHC) energies and at different rapidities using the leading order non-relativistic quantum chromodynamics model of heavy quarkonium production. We have included the contributions from hiher excited states decaying to J$ψ$ . The calculated values have been compared with the available data from the four experiments at LHC, namely ALICE, ATLAS, CMS and LHCb. In the case of ALICE, inclusive J/$ψ$ and $ψ$(2S) cross-sections have been calculated by including the feed-down from B mesons using a fixed-order next-to-leading logarithm formalism. It is found that all the experimental cross-sections are well described for $p_{\rm T} >$ 3 GeV within the theoretical uncertainties arising due to the choices of the factorization and renormalization scales.

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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