Flavor changing neutral Higgs bosons in a supersymmetric extension based on aQ6family symmetry

2007/12/04 by Naoko Kifune, Jisuke Kubo, Alexander Lenz · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Boson #Cabibbo–Kobayashi–Maskawa matrix #Higgs boson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quark #Yukawa potential #hep-ph

paper · pdf · doi:10.1103/physrevd.77.076010

published as Phys.Rev.D77:076010,2008 · 37 pages, 10 figures

arxiv created 2007/12/04 · openalex publication_date 2008/04/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

A supersymmetric extension of the standard model based on the discrete Q₆ family symmetry is considered, and we investigate flavor changing neutral current (FCNC) processes, especially those mediated by heavy flavor changing neutral Higgs bosons. Because of the family symmetry the number of the independent Yukawa couplings is smaller than that of the observed quantities such as the Cabibbo-Kobayashi-Maskawa matrix and the quark masses, so that the FCNCs can be parametrized only by the mixing angles and masses of the Higgs fields. We focus our attention on the mass differences of the neutral K, D, and B mesons. All the constraints including that from the ratio \ensuremathΔM_B_s/\ensuremathΔM_B_d can be satisfied, if the heavy Higgs bosons are heavier than \ensuremath∼1.5 TeV. If the constraint from \ensuremathΔM_K is slightly relaxed, the heavy Higgs bosons can be as light as \ensuremath∼0.4 TeV, which is within the accessible range of LHC.

Citations

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Cited by

• Testing the new CP phase in a supersymmetric model with Q6 family symmetry by Bs mixing