Top-quark pair production at next-to-next-to-leading order QCD in electron positron collisions

被引：24

作者：

Chen, Long ^{[1
]}

Dekkers, Oliver ^{[2
,3
]}

Heisler, Dennis ^{[1
]}

Bernreuther, Werner ^{[1
]}

Sci, Zong-Guo ^{[4
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Theoret Teilchenphys & Kosmol, D-52056 Aachen, Germany

[2] Johannes Gutenberg Univ Mainz, PRISMA Cluster Excellence, D-55099 Mainz, Germany

[3] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[4] Shandong Univ, Sch Phys, Jinan 250100, Shandong, Peoples R China

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2016年 / 12期

关键词：

NLO Computations; FORWARD-BACKWARD ASYMMETRY; DOUBLE-REAL RADIATION; HEAVY-QUARK; ANTENNA FACTORIZATION; E(+)E(-) ANNIHILATION; 2-LOOP CORRECTIONS; HARMONIC SUMS; FORM-FACTORS; JETS; VERTEX;

D O I：

10.1007/JHEP12(2016)098

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 set up a formalism, within the antenna subtraction framework, for computing the production of a massive quark-antiquark pair in electron positron collisions at next-to-next-to-leading order in the coupling alpha(s) of quantum chromodynamics at the differential level. Our formalism applies to the calculation of any infrared-safe observable. We apply this set-up to the production of top-quark top antiquark pairs in the continuum. We compute the production cross section and several distributions. We determine, in particular, the top-quark forward-backward asymmetry at order alpha(2)(s). Our result agrees with previous computations of this observable.

引用

页数：33

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