论文标题
了解$ j/ψ$和$ψ'$生产，使用未经相关的量子染色体动力学的修改版本
Understanding $J/ψ$ and $ψ'$ production using a modified version of Non-Relativistic Quantum Chromodynamics
论文作者
论文摘要
非相关量子染色体动力学（NRQCD）的预测与$ J/ψ$极化的数据之间存在严重分歧，该数据持续了将近四分之一世纪。我们发现，如果我们解释了扰动软胶状对NRQCD中中间魅力 - 抗逆转录组八位列状态的影响，则可以解决极化问题。此外，当使用$ j/ψ$上的运行1个数据和Tevatron的CDF实验中的$ψ'$生产时，该模型可提供良好的拟合并产生（无依赖性的）非扰动参数的值。这些反过来，这些可用于对$ j/ψ$和$ψ'$数据进行无参数的预测，从大型强子对撞机的CMS实验中进行无参数的预测，并且这些预测与CMS数据非常吻合。
There is serious disagreement between the predictions of Non-Relativistic Quantum Chromodynamics (NRQCD) and the data on $J/ψ$ polarisation which has persisted for almost a quarter of a century. We find that if we account for the effect of perturbative soft gluons on the intermediate charm-anticharm octet states in NRQCD then the polarisation problem can be resolved. In addition, this model, when used to fit the Run 1 data on $J/ψ$ and $ψ'$ production from the CDF experiment at Tevatron, gives good fits and yields values of (energy-independent) non-perturbative parameters. These, in turn, can be used to make parameter-free predictions for $J/ψ$ and $ψ'$ data from the CMS experiment at the Large Hadron Collider and the predictions are in excellent agreement with the CMS data.
