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arXiv 2105.04436hep-ph
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强子希格斯产生中精确的顶夸克质量依赖

Exact top-quark mass dependence in hadronic Higgs production

M. Czakon, R. V. Harlander, J. Klappert, M. Niggetiedt

AI总结:

本文计算NNLO QCD下有限顶夸克质量对强子希格斯产生截面的精确修正,给出13 TeV和8 TeV pp对撞机下的总效应,并消除LHC相关截面的一项主要理论不确定性。

摘要:

在更高微扰阶数下,有限顶夸克质量对包容性希格斯产生截面的影响,近三十年来一直是一个悬而未决的问题。本文报道了我们在NNLO QCD下对该效应的计算。对于纯胶子通道,相对于HEFT近似所得结果,该效应为+0.62%。形式上次要的部分子通道过度补偿了这一偏移,导致在pp对撞机能量13 TeV时总效应为-0.32%,在8 TeV时为-0.16%。该结果消除了LHC包容性希格斯产生截面的主要理论不确定性之一。

英文摘要:

The impact of the finite top-quark mass on the inclusive Higgs production cross section at higher perturbative orders has been an open question for almost three decades. In this paper, we report on the computation of this effect at NNLO QCD. For the purely gluonic channel, it amounts to $+0.62\%$ relative to the result obtained in the HEFT approximation. The formally sub-leading partonic channels over-compensate this shift, leading to an overall effect of $-0.32\%$ at a $pp$ collider energy of $13\,\mathrm{TeV}$, and $-0.16\%$ at $8\,\mathrm{TeV}$. This result eliminates one of the main theoretical uncertainties to inclusive Higgs production cross section at the LHC.

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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