Full NLO QCD corrections to off-shell t(t)over-barb(b)over-bar production

被引：17

作者：

Denner, Ansgar ^{[1
]}

Lang, Jean-Nicolas ^{[2
]}

Pellen, Mathieu ^{[3
]}

机构：

[1] Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Hilb Weg 22, D-97074 Wurzburg, Germany

[2] Univ Zurich, Phys Inst, CH-8057 Zurich, Switzerland

[3] Univ Cambridge, Cavendish Lab, 19 JJ Thomson Ave, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW D | 2021年 / 104卷 / 05期

基金：

欧洲研究理事会; 瑞士国家科学基金会;

关键词：

ELECTROWEAK RADIATIVE-CORRECTIONS; E(+)E(-); PAIR;

D O I：

10.1103/PhysRevD.104.056018

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this article, we report on the computation of the next-to-leading order (NLO) QCD corrections to pp -> mu(-)(nu) over bar (mu)e+nu(e) (b) over barb (b) over barb at the LHC, which is an irreducible background to pp -> t (t) over barH(-> b (b) over bar). This is the first time that a full NLO computation for a 2 -> 8 process with 6 external strongly interacting partons is made public. No approximations are used, and all off-shell and interference effects are taken into account. Cross sections and differential distributions from the full computation are compared to results obtained by using a double-pole approximation for the top quarks. The difference between the full calculation and the one using the double-pole approximation is in general below 5% but can reach 10% in some regions of phase space.

引用

页数：14

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