Invisible Higgs boson decay with B→Kνν̄ constraint

C. S. Kim, Seong Chan Park, Kai Wang, Guohuai Zhu

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


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 (1∼2GeV) SM singlet S and becomes invisible. By using the current experimental bound of rare decay B→Kνν̄ and computing the contribution of B→KSS to (the) B→K+I, 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.

Original languageEnglish
Article number054004
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number5
Publication statusPublished - 2010 Mar 9

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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