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题名: SUSY induced top quark FCNC decay t -> ch after Run I of LHC
作者: Cao, JJ ;  Han, CC ;  Wu, L ;  Yang, JM ;  Zhang, MC
刊名: EUROPEAN PHYSICAL JOURNAL C
出版日期: 2014
卷号: 74, 期号:9, 页码:3058
关键词: EVEN HIGGS BOSONS ;  STANDARD MODEL ;  MSSM ;  SUPERSYMMETRY ;  SEARCH ;  COLLIDERS ;  BREAKING ;  PHYSICS ;  MASSES
学科分类: Physics
DOI: 10.1140/epjc/s10052-014-3058-1
通讯作者: Cao, JJ (reprint author), Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China.
部门归属: [Cao, Junjie] Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China ;  [Cao, Junjie] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China ;  [Han, Chengcheng ;  Yang, Jin Min ;  Zhang, Mengchao] Acad Sinica, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China ;  [Han, Chengcheng] Asia Pacific Ctr Theoret Phys, Pohang 790784, South Korea ;  [Wu, Lei] Univ Sydney, Sch Phys, ARC Ctr Excellence Particle Phys Terascale, Sydney, NSW 2006, Australia
英文摘要: In light of the Higgs discovery and the nonobservation of sparticles at the LHC, we revisit the supersymmetric theory (SUSY) induced top quark flavor-changing decay into the Higgs boson. We perform a scan over the relevant SUSY parameter space by considering the constraints from the Higgs mass measurement, the LHC search for SUSY, the vacuum stability, the precision electroweak observables as well as B -> X-s gamma. We make the following observations: (1) In the Minimal Supersymmetric Standard Model (MSSM), the branching ratio of t -> ch can only reach 3.0 x 10(-6), which is about one order smaller than previous results obtained before the advent of the LHC. Among the considered constraints, the Higgs mass and the LHC search for sparticles are found to play an important role in limiting the prediction. (2) In the singlet extension of the MSSM, since the squark sector is less constrained by the Higgs mass, the branching ratio of t -> ch can reach the order of 10(-5) in the allowed parameter space. (3) The chiral-conserving mixings delta(LL) and delta(RR) may have remanent effects on t -> ch in the heavy SUSY limit. In the MSSM with squarks above 3 TeV and gluino above 4 TeV and meanwhile the CP-odd Higgs boson mass around 1 TeV, the branching ratio of t -> ch can still reach the order of 10(-8) under the constraints.
资助者: National Natural Science Foundation of China (NNSFC) [10821504, 11222548, 11305049, 11135003]; Program for New Century Excellent Talents in University; ARC Center of Excellence
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000350142100001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15650
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Cao, JJ,Han, CC,Wu, L,et al. SUSY induced top quark FCNC decay t -> ch after Run I of LHC[J]. EUROPEAN PHYSICAL JOURNAL C,2014,74(9):3058.
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