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题名: Top quark forward-backward asymmetry, flavor-changing neutral-current decays, and like-sign pair production as a joint probe of new physics
作者: Cao, JJ ;  Wang, L ;  Wu, L ;  Yang, JM
刊名: PHYSICAL REVIEW D
出版日期: 2011
卷号: 84, 期号:7, 页码:74001
关键词: MINIMAL SUPERSYMMETRIC MODEL ;  STANDARD MODEL ;  RARE DECAYS ;  3RD-FAMILY QUARKS ;  FCNC COUPLINGS ;  ONE-LOOP ;  LHC ;  COLLIDERS ;  SUSY ;  OPERATORS
学科分类: Physics
通讯作者: Cao, JJ (reprint author), Henan Normal Univ, Coll Phys & Informat Engn, Xinxiang 453007, Peoples R China.
部门归属: [Cao, Junjie; Wang, Lin] Henan Normal Univ, Coll Phys & Informat Engn, Xinxiang 453007, Peoples R China; [Wang, Lin; Wu, Lei; Yang, Jin Min] Acad Sinica, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
英文摘要: The anomaly of the top quark forward-backward asymmetry A(FB)(t) observed at the Tevatron can be explained by the t-channel exchange of a neutral gauge boson (Z') which has sizable flavor-changing coupling for top and up quarks. This gauge boson can also induce the top quark flavor-changing neutral-current (FCNC) decays and the like-sign top pair production at the LHC. In this work, we focus on two models which predict such a Z', namely, the left-right model and the U(1)(X) model, to investigate the correlated effects on A(FB)(t), the FCNC decays t -> uV (V = g, Z, gamma) and the like-sign top pair production at the LHC. We also pay special attention to the most recently measured A(FB)(t) in the large top pair invariant mass region. We find that under the current experimental constraints both models can alleviate the deviation of A(FB)(t) and, meanwhile, enhance the like-sign top pair production to the detectable level of the LHC. We also find that the two models give different predictions for the observables and their correlations, and thus they may even be distinguished by jointly studying these top quark observables.
资助者: HASTIT [2009HASTIT004]; National Natural Science Foundation of China (NNSFC) [10821504, 10725526, 10775039, 11075045]; Chinese Academy of Sciences [KJCX2.YW.W10]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000295541100004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14259
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Cao, JJ,Wang, L,Wu, L,et al. Top quark forward-backward asymmetry, flavor-changing neutral-current decays, and like-sign pair production as a joint probe of new physics[J]. PHYSICAL REVIEW D,2011,84(7):74001.
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