QCD corrections to the production of t(t)over-barγ at the ILC

被引：6
作者：
Liu, Ning [1 ]
机构：
[1] Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China
来源：
PHYSICS LETTERS B | 2012年 / 707卷 / 01期
关键词：
QUARK-PAIR PRODUCTION; HIGHER-ORDER CORRECTIONS; ELECTRIC-DIPOLE MOMENT; JET CROSS-SECTIONS; TOP-QUARK; RADIATIVE-CORRECTIONS; CP VIOLATION; STANDARD-MODEL; UNPOLARIZED PHOTONS; BROKEN SYMMETRIES;
D O I：
10.1016/j.physletb.2011.12.032
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A precise calculation of the top quark pair production associated with a hard photon is essential for testing the electroweak property of the top quark in the Standard Model (SM). We investigate the one-loop QCD corrections to the process e(+)e(-) -> t (t) over bar gamma at the International Linear Collider (ILC), and find that the K-factor can be as large as 1.238 (1.105, 1.060) for a center-of-mass energy root s = 500 (800, 1500) GeV. The transverse momentum distributions of the top quark and photon are respectively shown at leading order (LO) and next-to-leading order (NLO). Due to the asymmetric rapidity distribution of the top (anti-top) quark, we also study the top quark forward-backward asymmetry (A(FB)(t)) in try production at NLO, which is found to be 45.82 (55.25.55.89)% for root s = 500 (800, 1500) GeV. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：137 / 141
页数：5
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