标题： 大对数的求和通过部分子喷注 显示英文标题

标题： Summations of large logarithms by parton showers

摘要： 我们提出一种方法，用于检查部分子簇射如何对大对数进行求和。 在此方法中，人们处理感兴趣的可观测量分布的适当积分变换。 然后，重新表述部分子簇射，以便将变换后的分布作为指数形式，从而可以计算指数的微扰展开项。 我们将这一通用方案应用于电子-正电子湮灭中的倾角分布，并使用了多种簇射算法。 在我们使用的方法中，最普遍适用的是通过数值积分计算指数中的一些微扰系数，并检验它们是否与倾角对数的下一阶对数求和一致。 显示英文摘要

摘要： We propose a method to examine how a parton shower sums large logarithms. In this method, one works with an appropriate integral transform of the distribution for the observable of interest. Then, one reformulates the parton shower so as to obtain the transformed distribution as an exponential for which one can compute the terms in the perturbative expansion of the exponent. We apply this general program to the thrust distribution in electron-positron annihilation, using several shower algorithms. Of the approaches that we use, the most generally applicable is to compute some of the perturbative coefficients in the exponent by numerical integration and to test whether they are consistent with next-to-leading-log summation of the thrust logarithms.