AI 中文总结
该研究利用13 TeV质子-质子碰撞数据测量含\(\Upsilon\)(nS)介子喷注的碎裂特性，通过其衰变成μ子对重建相关介子，研究其动量投影，与蒙特卡罗预测比较，发现现有预测对数据描述不佳，为相关过程建模改进提供了空间。
AI 中文摘要
本文展示了利用\(\sqrt{s}\)=13 TeV、积分亮度为138 fb\(^{-1}\)的质子-质子碰撞数据对含\(\Upsilon\)(nS)介子喷注的碎裂特性进行的测量。通过\(\Upsilon\)(nS)介子衰变成一对电荷相反的μ子来重建与喷注相关的\(\Upsilon\)(nS)介子。研究了\(\Upsilon\)(nS)介子动量沿相应喷注动量的纵向和横向投影。将结果与蒙特卡罗预测进行比较，发现这些预测对数据的描述并不令人满意，此类过程的建模仍有改进空间。
英文摘要
A measurement of the fragmentation properties of jets containing $Υ$(nS) mesons using proton-proton collision data at $\sqrt{s}$ = 13 TeV, corresponding to an integrated luminosity of 138 fb$^{-1}$, is presented. The $Υ$(nS) mesons associated with jets are reconstructed via their decays producing pairs of oppositely charged muons. The longitudinal and transverse projections of the momenta of the $Υ$(nS) mesons along the momenta of the corresponding jets are studied. The results are compared with Monte Carlo predictions, including recent developments in the modelling of quarkonia production in parton showers. The description of the data by these Monte Carlo predictions is found to be unsatisfactory, leaving room for improvements in the modelling of such processes.
CommentsThis version has an updated author list. Submitted to the Journal of High Energy Physics. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-25-005 (CMS Public Pages)
