Flavor violating leptonic decays of the Higgs boson

2016/08/31 by Seham Fathy, Tarek Ibrahim, Ahmad Itani +1 · 5 citations
Physics and Astronomy · #Boson #Branching fraction #Electron #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Lepton #Minimal Supersymmetric Standard Model #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Standard Model (mathematical formulation) #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.94.115029

published in Physical review. D/Physical review. D. 94(11) (American Physical Society) · 33 pages, 13 figures. Accepted for publication in PRD

arxiv created 2016/12/09 · openalex publication_date 2016/12/28 · arxiv updated 2017/01/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

Recent data from the ATLAS and CMS detectors at the Large Hadron Collider at CERN give a hint of possible violation of flavor in the leptonic decays of the Higgs boson. In this work we analyze the flavor violating leptonic decays H₁⁰\ensuremath→l_il_j (i\ensuremath≠j) within the framework of a minimal supersymmetric standard model extension with a vectorlike leptonic generation. Specifically we focus on the decay mode H₁⁰\ensuremath→\ensuremathμ\ensuremathτ. The analysis is done including tree and loop contributions involving exchange of W, Z, charged and neutral Higgs bosons and leptons and mirror leptons, charginos and neutralinos and sleptons and mirror sleptons. It is found that a substantial branching ratio of H₁⁰\ensuremath→\ensuremathμ\ensuremathτ, i.e., of as much as O(1)%, can be achieved in this model, the size hinted by the ATLAS and CMS data. The flavor violating decays H₁⁰\ensuremath→e\ensuremathμ, e\ensuremathτ are also analyzed and found to be consistent with the current experimental limits. An analysis of the dependence of flavor violating decays on CP phases is given. The analysis is extended to include flavor decays of the heavier Higgs bosons. A confirmation of the flavor violation in Higgs boson decays with more data that is expected from LHC at √(s)=13 TeV will be evidence of new physics beyond the standard model.

Citations

• Supersymmetry and an extra vectorlike generation
• Higgs boson flavor-changing neutral coupling andh→t*cdecay at a muon collider
• Fermion mass generation inSO(10)with a unified Higgs sector
• Flavor changing Higgs decays in supersymmetry with minimal flavor violation
• Large tau and tau neutrino electric dipole moments in models with vectorlike multiplets
• Flavor changing neutral Higgs boson decays from squark-gluino loops
• Higgs diphoton rate and mass enhancement with vectorlike leptons and the scale of supersymmetry
• Higgs-boson andZ-boson flavor-changing neutral-current decays correlated withB-meson decays in the littlest Higgs model withTparity
• Yukawa couplings and quark and lepton masses in anSO(10)model with a unified Higgs sector
• Searches for Lepton Flavor Violation in the Decaysτ±→e±γandτ±→μ±γ
• Higgs boson mass, sparticle spectrum, and the little hierarchy problem in an extended MSSM
• Review of Multibody Charm Analyses

Cited by

• Flavor violating top decays and flavor violating quark decays of the Higgs boson