Associated production of a top-quark pair with two isolated photons at the LHC through NLO in QCD

被引：3

作者：

Stremmer, Daniel ^{[1
]}

Worek, Malgorzata ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Theoret Particle Phys & Cosmol, D-52056 Aachen, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 2023卷 / 08期

关键词：

Higher-Order Perturbative Calculations; Specific QCD Phenomenology; Top Quark; ELECTROWEAK RADIATIVE-CORRECTIONS; BOSON;

D O I：

10.1007/JHEP08(2023)179

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We report on the computation of NLO QCD corrections to top-quark pair production in association with two photons at the LHC. Higher-order effects and photon bremsstrahlung are taken into account in the production and decays of the top-quark pair. Top-quark and W-boson decays are treated in the Narrow Width Approximation conserving spin correlations up to NLO in QCD. This is the first time that the complete set of NLO QCD corrections to the pp -> t (t) over bar gamma gamma. process including top-quark decays is calculated. We present results at the integrated and differential cross-section level in the di-lepton and lepton + jet channel. In addition, we investigate the effect of photon bremsstrahlung in t (t) over bar production and top-quark decays, as well as the mixed contribution. The latter contribution, in which two photons occur simultaneously in the production and decay of the t (t) over bar pair, proved to be significant at both the integrated and differential cross-section level.

引用

页数：38

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