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arXiv 2307.07565hep-ph
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含重夸克过程中的软重求和:弥合4味方案与5味方案之间的差距

Soft resummation in processes with heavy quark: bridging the gap from 4-flavor to 5-flavor scheme

Andrea Ghira

AI总结:

本文提出含重夸克过程阈值重求和的新框架,可同时一致重求和质量与重味能量分数对数,并匹配4味与5味方案。

摘要:

在本工作中,我们提出了一种处理含重夸克过程中阈值重求和的新方法。具体而言,我们将聚焦于色单态粒子衰变为$b \ar b$对的微分衰变率,并展示如何以一致的方式同时重求和质量的对数以及重味能量分数的对数。在此框架内,我们匹配了文献中现存的两种不同的阈值重求和方法,二者的主要区别在于处理质量的方式(5味方案与4味方案)。

英文摘要:

In this work we present a new approach to threshold resummation in processes with heavy quarks. In particular we will focus on the differential decay rate of a color-singlet particle into a $b \bar b$ pair and we will show how to resum in a consistent way both the logarithms of the mass and the logarithms of the heavy flavor energy fraction. Within this framework, we match the two different approaches existing in literature to threshold resummation, the main difference of which is the way in which the mass is treated (5-flavor scheme vs 4-flavor scheme).

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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