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arXiv 0907.1443hep-ph
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重粒子对产生中的软辐射:全序色结构和双圈反常维数

Soft radiation in heavy-particle pair production: all-order colour structure and two-loop anomalous dimension

M. Beneke, P. Falgari, C. Schwinn

摘要:

本文给出了强子碰撞中重色粒子对在产生阈下的因式分解公式,它为软胶子和库仑胶子的重新命名奠定了基础。我们在色空间中构造了一个基,它将因子分解公式中出现的软函数对角化到微扰论中的所有阶。这扩展了最近的软异常尺寸的结构上的结果,并允许我们确定一个分析表达式的两个循环软异常尺寸在阈值的所有感兴趣的生产过程。

英文摘要:

We present a factorization formula for the production of pairs of heavy coloured particles in hadronic collisions at the production threshold, which forms the basis for the resummation of soft gluons and Coulomb gluons. We construct a basis in colour space that diagonalizes the soft function appearing in the factorization formula to all orders in perturbation theory. This extends recent results on the structure of soft anomalous dimensions and allows us to determine an analytic expression for the two-loop soft anomalous dimension at threshold for all production processes of interest.

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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