Colored bosons on top FBA and angular cross section for t(t)over-bar production

被引：2

作者：

Benbrik, R. ^{[1
,2
]}

Chen, Chuan-Hung ^{[5
]}

EL Kacimi, M. ^{[3
,4
]}

机构：

[1] CSIC UC, Inst Fis Cantabria, Santander, Spain

[2] Fac Polydisciplinaire Safi, Safi 46000, Morocco

[3] Cadi Ayyad Univ, FSSM, LPHEA, Marrakech, Morocco

[4] Lab Annecy Le Vieux Phys Particules, LAPP, Annecy, France

[5] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

来源：

PHYSICS LETTERS B | 2013年 / 725卷 / 4-5期

关键词：

PP COLLISIONS; CHIRAL COLOR; ASYMMETRY; SEARCH; GLUONS; MODEL;

D O I：

10.1016/j.physletb.2013.07.057

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

With full data set that corresponds to an integrated luminosity of 9.4 fb(-1), CDF has updated the top-quark forward-backward asymmetry (FBA) as functions of rapidity difference vertical bar Delta y vertical bar and t (t) over bar invariant mass M-t (t) over bar. Beside the sustained inconsistency between experiments and standard model (SM) predictions at large vertical bar Delta y vertical bar and M-t (t) over bar, an unexpected large first Legendre moment with a(1) = 0.39 +/- 0.108 is found. In order to solve the large top FBA, we study the contributions of color triplet scalar and color octet vector boson. We find that the top FBA at vertical bar Delta y vertical bar > 1 (M-t (t) over bar >450 GeV) in triplet and octet model could be enhanced to be around 40% (30%) and 26% (20%), whereas the first Legendre moment is a(1)(Di) = 0.38 and a(1)(Axi) = 0.23, respectively. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.

引用

页码：372 / 377

页数：6

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