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arXiv 2209.06102hep-ph
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因式分解中减法项的强序红外极限

Strongly-ordered infrared limits for subtraction counterterms from factorisation

Lorenzo Magnea, Calum Milloy, Chiara Signorile-Signorile, Paolo Torrielli, Sandro Uccirati

摘要:

在简要介绍了高阶对撞机观测量的红外发散度相减问题之后,我们从因式分解的角度对强有序软共线多重辐射进行了初步研究。我们表明,矩阵元素的领域和威尔逊线,描述软和共线辐射的因式分解散射振幅可以重新因式分解强有序的限制,提供了一个系统的方法来计算它们,以消除其奇异性结构,并建立强有序配置的本地减法计数。我们的研究结果提供了一个详细的组织减法算法的工具,在原则上所有订单微扰理论。

英文摘要:

After a brief introduction to the problem of subtraction of infrared divergences for high-order collider observables, we present a preliminary study of strongly-ordered soft and collinear multiple radiation from the point of view of factorisation. We show that the matrix elements of fields and Wilson lines that describe soft and collinear radiation in factorised scattering amplitudes can be re-factorised in strongly-ordered limits, providing a systematic method to compute them, to characterise their singularity structure, and to build local subtraction counterterms for strongly-ordered configurations. Our results provide tools for a detailed organisation of subtraction algorithms, in principle to all orders in perturbation theory.

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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