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arXiv 1202.5224hep-ph
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半包含e+e湮没的广义阈值重算

Generalized threshold resummation for semi-inclusive e+e- annihilation

N. A. Lo Presti, A. Vogt, A. A. Almasy

摘要:

最近的方法已经发展到扩展的包含深非弹性散射(DIS)中的大x的双光子数的重新计算的软胶子指数没有解决的条款。在这里,我们简要地概述了我们的方法的基础上固定的顺序结果,一般的大x结构在维正则化和质量奇点的全阶因式分解,这也是直接适用于半包容的e+e-湮没(SIA)。然后,我们提出了相应的类时分裂函数和横向和纵向碎裂函数的一些主要结果。DIS和SIA之间的密切关系,便于确定额外的三阶结果,后者的功能,这是完全已知的,只有在下一个领先的顺序。因此,上述所有量都可以以次至次至前导的对数精度表示。

英文摘要:

Recently methods have been developed to extend the resummation of large-x double logarithms in inclusive deep-inelastic scattering (DIS) to terms not addressed by the soft-gluon exponentiation. Here we briefly outline our approach based on fixed-order results, the general large-x structure in dimensional regularization and the all-order factorization of mass singularities, which is directly applicable also to semi-inclusive e+e- annihilation (SIA). We then present some main results for the corresponding timelike splitting functions and transverse and longitudinal fragmentation functions. The close relation between DIS and SIA facilitates the determination of additional third-order results for the latter function which is fully known only at the next-to-leading order. Therefore all above quantities can be resummed at next-to-next-to-leading logarithmic accuracy.

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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