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题名: Rare Z-decay into light CP-odd Higgs bosons: a comparative study in different new physics models
作者: Cao, Junjie ;  Heng, Zhaoxia ;  Yang, Jin Min
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2010
期号: 11, 页码:-
关键词: SUPERSYMMETRIC STANDARD MODEL ;  E(+)E(-) COLLISIONS ;  OPAL DETECTOR ;  SEARCH ;  LEP ;  COLLIDERS ;  MSSM ;  PHENOMENOLOGY ;  PARAMETERS ;  NEUTRALINO
学科分类: Physics
通讯作者: Cao, JJ , Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China
部门归属: [Cao, JJ] Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China; [Heng, ZX; Yang, JM] Acad Sinica, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
英文摘要: Various new physics models predict a light CP-odd Higgs boson (labeled as a) and open up new decay modes for Z-boson, such as Z -> (f) over bar fa, Z -> a gamma and Z -> aaa, which could be explored at the GigaZ option of the ILC. In this work we investigate these rare decays in several new physics models, namely the type-II two Higgs doublet model (type-II 2HDM), the lepton-specific two Higgs doublet model (L2HDM), the nearly minimal supersymetric standard model (nMSSM) and the next-to-minimal supersymmetric standard model (NMSSM). We find that in the parameter space allowed by current experiments, the branching ratios can reach 10(-4) for Z -> (f) over bar fa (f = b,tau), 10(-9) for Z -> a gamma and 10(-3) for Z -> aaa, which implies that the decays Z -> (f) over bar fa and Z -> aaa may be accessible at the GigaZ option. Moreover, since different models predict different patterns of the branching ratios, the measurement of these rare decays at the GigaZ may be utilized to distinguish the models.
资助者: HASTIT[2009HASTIT004]; National Natural Science Foundation of China (NNSFC)[10821504, 10725526, 10635030, 10775039, 11075045]; Chinese Academy of Sciences[KJCX2.YW.W10]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000284962600050
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5024
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Cao, Junjie,Heng, Zhaoxia,Yang, Jin Min. Rare Z-decay into light CP-odd Higgs bosons: a comparative study in different new physics models[J]. JOURNAL OF HIGH ENERGY PHYSICS,2010(11):-.
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