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arXiv 2109.09752hep-phhep-th
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次领先功率下新部分子通道的阈值重算

Threshold resummation of new partonic channels at next-to-leading power

Melissa van Beekveld, Leonardo Vernazza, Chris D. White

摘要:

对撞机中涉及重粒子的观测量在阈值附近具有很大的对数项,必须对微扰理论中的所有阶求和才能获得合理的结果。相对最近,这种重申已被扩展到次领先的权力在阈值变量,使用各种方法。在本文中,我们考虑部分子通道,打开只在下一个领先的权力,并表明,它是可能的,以恢复领先的量子色动力学使用完善的图解技术。我们首先考虑深非弹性散射,在那里我们重现最近的研究结果,使用有效的理论方法。接下来,我们考虑了Drell-Yan和希格斯玻色子产生中的夸克胶子通道,表明可以得到一个明确的全阶形式的主导对数部分子截面。我们的结果与以前的基于固定阶结果的计算结果一致。

英文摘要:

Collider observables involving heavy particles are subject to large logarithmic terms near threshold, which must be summed to all orders in perturbation theory to obtain sensible results. Relatively recently, this resummation has been extended to next-to-leading power in the threshold variable, using a variety of approaches. In this paper, we consider partonic channels that turn on only at next-to-leading power, and show that it is possible to resum leading logarithms using well-established diagrammatic techniques in Quantum Chromodynamics. We first consider deep inelastic scattering, where we reproduce the results of a recent study using an effective theory approach. Next, we consider the quark-gluon channel in both Drell-Yan and Higgs boson production, showing that an explicit all-order form for the leading logarithmic partonic cross section can be obtained. Our results agree with previous conjectures based on fixed-order results.

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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