Invisible Higgs boson decay with B → Kv(v)over-bar constraint

被引：22

作者：

Kim, C. S. ^{[1
,2
]}

Park, Seong Chan ^{[2
]}

Wang, Kai ^{[2
]}

Zhu, Guohuai ^{[3
,4
]}

机构：

[1] Yonsei Univ, Dept Phys, Seoul 120479, South Korea

[2] Univ Tokyo, Inst Phys & Math Universe, Chiba 2778568, Japan

[3] Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Zhejiang, Peoples R China

[4] Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China

来源：

PHYSICAL REVIEW D | 2010年 / 81卷 / 05期

基金：

美国国家科学基金会;

关键词：

DARK-MATTER; MODEL;

D O I：

10.1103/PhysRevD.81.054004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

If the Higgs boson were the only particle within the LHC accessible range, precision measurement of the Higgs's properties would play a unique role in studying electroweak symmetry breaking as well as possible new physics. We try to use low energy experiments such as rare B decay to constrain a challenging decay mode of Higgs, in which a Higgs decays to a pair of light (approximate to 1 similar to 2 GeV) SM singlet S and becomes invisible. By using the current experimental bound of rare decay B -> Kv (v) over bar and computing the contribution of B -> KSS to (the) B -> K + E, we obtain an upper bound on the Higgs coupling to such light singlet. It is interesting that the partial width of the invisible decay mode h ! SS by taking the upper bound value of coupling is at a comparable level with h -> WW/ZZ or WW(*) decay modes, making the Higgs identifiable but with a different predicted decay branching ratio from [the] standard model Higgs decay. It will then have an impact on precision measurement of the Higgs's properties. We also study the implication for cosmology from such a light singlet and propose a solution to the potential problem.

引用

页数：8

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