SUSY induced top quark FCNC decay t -> ch after Run I of LHC

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	SUSY induced top quark FCNC decay t -> ch after Run I of LHC
	Yang, JM
刊名	EUROPEAN PHYSICAL JOURNAL C
	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
ISSN号	1434-6044
通讯作者	Cao, JJ (reprint author), Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China.
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.
学科主题	Physics
收录类别	SCI
资助信息	National Natural Science Foundation of China (NNSFC) [10821504, 11222548, 11305049, 11135003]; Program for New Century Excellent Talents in University; ARC Center of Excellence
原文出处	http://dx.doi.org/10.1140/epjc/s10052-014-3058-1
语种	英语
WOS记录号	WOS:000350142100001
公开日期	2015-06-03
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15650]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Yang, JM. SUSY induced top quark FCNC decay t -> ch after Run I of LHC[J]. EUROPEAN PHYSICAL JOURNAL C,2014,74(9):3058.
APA	Yang, JM.(2014).SUSY induced top quark FCNC decay t -> ch after Run I of LHC.EUROPEAN PHYSICAL JOURNAL C,74(9),3058.
MLA	Yang, JM."SUSY induced top quark FCNC decay t -> ch after Run I of LHC".EUROPEAN PHYSICAL JOURNAL C 74.9(2014):3058.