Electroweak Sudakov corrections and the top quark forward-backward asymmetry

被引：65
|
作者：
Manohar, Aneesh V. [1 ]
Trott, Michael [2 ]
机构：
[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
[2] CERN, Div Theory, Dept Phys, CH-1211 Geneva 23, Switzerland
来源：
PHYSICS LETTERS B | 2012年 / 711卷 / 3-4期
关键词：
D O I：
10.1016/j.physletb.2012.04.013
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The Standard Model (SM) top quark forward backward asymmetry is shown to be slightly enhanced by a correction factor of 1.05 due to electroweak Sudakov (EWS) logs of the form (alpha/ sin(2) theta w)(n) log(m <= 2n) (s/M-W, Z(2)). The EWS effect on the dijet and t (t) over bar invariant mass spectra reduces the SM prediction by similar to 20.10% respectively for the highest invariant masses measured at the LHC, and changes the shape of the high-mass tail. These corrections affect measurements of the top quark invariant mass spectrum and the search for excess events related to A(FB)(t (t) over bar). (c) 2012 Elsevier BM. All rights reserved.
引用
收藏
页码：313 / 316
页数：4
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