Non-Abelian discrete family symmetry to soften the SUSY flavor problem and to suppress proton decay

Itou, Etsuko; Kajiyama, Yuji; Kubo, Jisuke

doi:10.1016/j.nuclphysb.2006.02.042

Cited by 47 publications

(36 citation statements)

References 129 publications

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“…The supersymmetric flavor model of [7,21,22] is based on a dicyclic dihedral group Q 6 . If CP is spontaneously broken, the nine parameters of the model express six quark masses and four CKM parameters.…”

Section: The Modelmentioning

confidence: 99%

“…As in the original model of [7,21,22] we assume that the flavor symmetry of the Yukawa sector is based on Q 6 . In Table I Table I we see that the one+two structure of family is realized, and because of this structure the Q 6 flavor symmetry can ensure that no non-diagonal kinetic term can be induced.…”

Section: A the Yukawa Sectormentioning

confidence: 99%

“…The theoretical values of δ's for the present model have been calculated in Ref. [22] as a function of the average sfermion masses and fine tuning parameters. The results may be summarized as follows.…”

Section: Fcncmentioning

confidence: 99%

“…It has been later realized in Refs. [21,22] that through an appropriate change of the lepton assignment the leptonic sector can be brought into the same form as that of the model of [23,24]. Then there are only seven parameters in the leptonic sector of the model to fix six lepton masses and six Maki-Nakagawa-Sakata (MNS) parameters.…”

Section: Introductionmentioning

confidence: 99%

“…We only briefly mention FCNCs and CP violations in the SSB sector and in the lepton sector, because detailed investigations on these subjects have been recently carried out in Ref. [22] and in Ref. [25], respectively.…”

Section: Introductionmentioning

confidence: 99%

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

2008

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A supersymmetric extension of the standard model based on the discrete Q 6 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 ∆M Bs /∆M B d can be satisfied, if the heavy Higgs bosons are heavier than ∼ 1.5 TeV. If the constraint from ∆M K is slightly relaxed, the heavy Higgs bosons can be as light as ∼ 0.4 TeV, which is within the accessible range of LHC.

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Section: The Modelmentioning

confidence: 99%

Section: A the Yukawa Sectormentioning

confidence: 99%

Section: Fcncmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2008

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Super flavorsymmetry with multiple Higgs doublets

Kubo

2012

Fortschritte der Physik

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The meaning of non-abelian super flavorsymmetry in the presence of Multiple Higgs Doublets is twofold: The first one is to order the Yukawa sector of the standard model, while generating the Cheng-Sher suppression of tree-level Flavor Changing Neutral Currents (FCNCs), and the second one is to soften the fine tuning problem in the scalar potential and at the same time to suppress FCNCs coming from the soft breaking of supersymmetry. If spontaneous CP violation is combined with non-abelian super flavorsymmetry the CP phases in the soft supersymmetry breaking sector can disappear. This feature of super flavorsymmetry is reviewed and elaborated in a supersymmetric model of flavor based on the finite group Q 6 . The predictions of the model in ferimion mass and mixing, and flavor and CP violation can be tested in future experiments.

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