AI 中文总结
本研究分析碎裂机制对重夸克偶素对强子产生的贡献，构建di强子碎裂函数微扰模型，发现LHC运动学中di强子碎裂贡献量级与单、双部分子散射相当。
AI 中文摘要
本文分析了碎裂机制对重夸克偶素对的包含强子产生的贡献，同时考虑了单强子和双强子（di强子）碎裂道。为估计后者机制的贡献，我们构建了一个di强子碎裂函数的微扰模型，该模型在重夸克偶素对的大不变质量极限下有效。利用色玻璃凝聚（Color Glass Condensate）框架计算$Q\bar{Q}$产生振幅，我们发现，在大型强子对撞机（LHC）运动学区域，重夸克到夸克偶素的单碎裂仅为微小修正，而di强子碎裂可提供相当大的贡献，其量级与单部分子和双部分子散射的贡献相当。
英文摘要
In this manuscript, we analyze the contribution of fragmentation mechanisms to the inclusive hadroproduction of heavy quarkonium pairs, taking into account both single- and double-hadron (dihadron) fragmentation channels. To estimate the contribution of the latter mechanism, we construct a microscopic perturbative model of the dihadron fragmentation function, which is valid in the limit of large invariant masses of the heavy quarkonium pair. Using the Color Glass Condensate framework to evaluate the $Q\bar{Q}$ production amplitude, we find that in LHC kinematics, the single fragmentation of heavy quarks into quarkonium is only a minor correction, whereas dihadron fragmentation can provide a sizable contribution, on par with the contributions of single- and double-parton scattering.
Comments25 pages, 7 figures
