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	Top quark forward-backward asymmetry in the little Higgs model
	Guo XD(郭星导) ; Zhang YJ(张印杰) ; Zhao SM(赵树民) ; Feng TF(冯太傅) ; Yuan XH(袁煦浩) ; Li XQ(李学潜) ; GUO Xing-Dao ; ZHANG Yin-Jie ; ZHAO Shu-Min ; FENG Tai-Fu ; YUAN Xu-Hao ; LI Xue-Qian
	2016-03-30 ; 2016-03-30
关键词	forward-backward asymmetry little Higgs model one-loop diagram Feynman amplitude O572.33
其他题名	Top quark forward-backward asymmetry in the little Higgs model
中文摘要	A sizable difference in top quark pair forward backward asymmetry(AFB) is observed at Tevatron. The discrepancy triggers many new physics beyond the standard model(SM) and then constrains the parameter spaces in them. In this article we calculate the AFB of the top-pair production at Tevatron up to next to leading order(NLO) in the little Higgs model(LHM). We find that the contribution of ZH can be large enough to make up the gap between SM prediction and experimental data. Then, the parameter space for the couplings between ZH and quarks are constrained. Thus, this model can fulfill the experimental data, both in AFB and in cross section.; A sizable difference in top quark pair forward backward asymmetry(AFB) is observed at Tevatron. The discrepancy triggers many new physics beyond the standard model(SM) and then constrains the parameter spaces in them. In this article we calculate the AFB of the top-pair production at Tevatron up to next to leading order(NLO) in the little Higgs model(LHM). We find that the contribution of ZH can be large enough to make up the gap between SM prediction and experimental data. Then, the parameter space for the couplings between ZH and quarks are constrained. Thus, this model can fulfill the experimental data, both in AFB and in cross section.
语种	英语 ; 英语
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/143208]
专题	清华大学
推荐引用方式 GB/T 7714	Guo XD,Zhang YJ,Zhao SM,et al. Top quark forward-backward asymmetry in the little Higgs model[J],2016, 2016.
APA	郭星导.,张印杰.,赵树民.,冯太傅.,袁煦浩.,...&LI Xue-Qian.(2016).Top quark forward-backward asymmetry in the little Higgs model..
MLA	郭星导,et al."Top quark forward-backward asymmetry in the little Higgs model".(2016).

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