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arXiv 2302.02729hep-ph
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LHC上单顶夸克产生过程的线性幂次修正

Linear power corrections to single top production processes at the LHC

Sergei Makarov, Kirill Melnikov, Paolo Nason, Melih A. Ozcelik

AI总结:

本研究利用重整化子方法和Low-Burnett-Kroll定理分析LHC单顶夸克电弱产生,证明采用短程顶夸克质量时总截面无线性幂次修正,并给出含顶夸克动量可观测量的普适修正公式。

摘要:

我们利用重整化子微积分讨论了LHC上顶夸克电弱产生过程的线性幂次修正。我们展示了如何使用Low-Burnett-Kroll定理获得此类非微扰修正,该定理给出了实发射振幅在软极限附近展开的首个次领头项。我们证明,只要任意单顶夸克产生类型过程的总截面以短程顶夸克质量表示,这些总截面就不存在线性幂次修正。我们还推导了一个适用于涉及顶夸克动量的一般可观测量的线性幂次修正的普适公式。

英文摘要:

We discuss the linear power corrections to the electroweak production of top quarks at the LHC using renormalon calculus. We show how such non-perturbative corrections can be obtained using the Low-Burnett-Kroll theorem, which provides the first subleading term to the expansion of the real-emission amplitudes around the soft limit. We demonstrate that there are no linear power corrections to the total cross sections of arbitrary processes of a single top production type provided that these cross sections are expressed in terms of a short-distance top quark mass. We also derive a universal formula for the linear power corrections to generic observables that involve the top-quark momentum.

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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