Model building for flavor changing Higgs couplings

Avital Dery, Aielet Efrati, Yosef Nir, Yotam Soreq, Vasja Susic, Vasja Susič

Research output: Contribution to journalArticlepeer-review

Abstract

If t→hq (q=c,u) or h→τ (=μ,e) decays are observed, it will be a clear signal of new physics. We investigate whether natural and viable flavor models can saturate the present direct upper bounds without violating the indirect constraints from low energy loop processes. We carry out our analysis in two theoretical frameworks: minimal flavor violation (MFV) and Froggatt-Nielsen symmetry (FN). The simplest models in either framework predict flavor changing couplings that are too small to be directly observed. Yet, in the MFV framework, it is possible to have lepton flavor changing Higgs couplings close to the bound if spurions related to heavy singlet neutrinos play a role. In the FN framework, it is possible to have large flavor changing couplings in both the up and the charged lepton sectors if supersymmetry plays a role.

Original languageEnglish
Article number115022
JournalPhysical review D
Volume90
Issue number11
DOIs
StatePublished - 1 Dec 2014

All Science Journal Classification (ASJC) codes

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

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