Czakon M, Harlander R V, Klappert J, Niggetiedt M
Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen University, 52056 Aachen, Germany.
Phys Rev Lett. 2021 Oct 15;127(16):162002. doi: 10.1103/PhysRevLett.127.162002.
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 Letter, we report on the computation of this effect at next-to-next-to-leading order QCD. For the purely gluonic channel, it amounts to +0.62% relative to the result obtained in the Higgs effective field theory approximation. The formally subleading partonic channels overcompensate this shift, leading to an overall effect of -0.26% at a pp collider energy of 13 TeV, and -0.1% at 8 TeV. This result eliminates one of the main theoretical uncertainties to inclusive Higgs production cross section at the LHC.
近三十年来，有限顶夸克质量对更高微扰阶次下的希格斯粒子 inclusive 产生截面的影响一直是个悬而未决的问题。在本快报中，我们报告了在次下一个领先阶 QCD 下对该效应的计算。对于纯胶子通道，相对于希格斯有效场论近似得到的结果，其贡献为 +0.62%。形式上次要的部分子通道过度补偿了这一偏移，在质心能量为 13 TeV 的质子 - 质子对撞机中导致的总体效应为 -0.26%，在 8 TeV 时为 -0.1%。这一结果消除了大型强子对撞机中希格斯粒子 inclusive 产生截面的主要理论不确定性之一。
