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arXiv 2108.08897hep-ph
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某些对撞机观测量的线性功率修正

On linear power corrections in certain collider observables

Fabrizio Caola, Silvia Ferrario Ravasio, Giovanni Limatola, Kirill Melnikov, Paolo Nason

摘要:

研究了线性功率修正${\cal O}(Λ_{\rm QCD}/Q)$对对撞机观测量的影响。我们提出的论点,证明这种修正不能出现在观测,是包容性的QCD辐射,如总截面以及快度和横向动量分布的颜色中性粒子。虽然我们的计算是在一个简化的框架下进行的,我们的论点和结论是适用的,有一些保留,轻子和强子对撞机的过程。我们还展示了如何提高对线性功率校正的起源的理解,使我们能够简化其计算。作为应用,我们计算了一般三喷流结构中$e^+e^-$湮灭过程中$C$参数和推力的主要非微扰修正。

英文摘要:

We study linear power corrections ${\cal O}(Λ_{\rm QCD}/Q)$ to certain collider observables. We present arguments that prove that such corrections cannot appear in observables that are inclusive with respect to QCD radiation, such as total cross sections as well as rapidity and transverse momentum distributions of color-neutral particles. Although our calculations are carried out in a simplified framework, our arguments and conclusions are applicable, with some reservations, to processes both at lepton and hadron colliders. We also show how an improved understanding of the origin of linear power corrections allows us to simplify their calculation. As an application, we compute the leading non-perturbative corrections to the $C$-parameter and the thrust in $e^+e^-$ annihilation in a generic three-jet configuration.

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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