NNLO+PS 时完整理论中的希格斯玻色子产生

IF 4.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2024-10-01 DOI:10.1016/j.physletb.2024.139043

Marco Niggetiedt, Marius Wiesemann

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引用次数: 0

摘要

我们考虑了在强子对撞中的胶子聚变中产生标准模型（SM）希格斯玻色子的问题，计算了QCD修正到邻近前沿阶（NNLO），并将其与偏子显影（NNLO+PS）相匹配。在不对介导胶子和希格斯玻色子之间耦合的顶夸克环进行任何近似的情况下，我们考虑了对顶夸克质量的完全依赖。为此，我们在完整的 SM 理论中包含了高达三个环的 gg→H 振幅和高达两个环的 pp→H+jet 振幅。这是在 QCD 中首次完全差分地计算了直到 NNLO 的顶夸克质量效应，我们还研究了它们对大型强子对撞机相关观测指标的影响。

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Higgs-boson production in the full theory at NNLO+PS

We consider the production of a Standard-Model (SM) Higgs boson in gluon fusion in hadronic collisions and compute the QCD corrections up to next-to-next-to-leading order (NNLO) and match them to parton showers (NNLO+PS). The complete dependence on the top-quark mass is taken into account without making any approximations to the top quark loops mediating the coupling between the gluons and the Higgs boson. To this end, we have included the

g g \to H

amplitudes up to three loops and the

p p \to H

+jet amplitudes up to two loops in the full SM theory. This is the first fully differential calculation of the top-quark mass effects up to NNLO in QCD, and we study their impact on relevant observables for the LHC.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.