A Three Higgs Doublet Model for Fermion Masses-中国期刊网

摘要 InthispaperweproposeapossibleexplanationtotheFermionmasshierarchyproblembyfittingthetype-IIseesawmechanismintotheHiggsdoubletsector,suchthattheirvacuumexpectationvaluesarehierarchal.WeextendtheStandardModelwithtwoextraHiggsdoubletsaswellasaspontaneouslybrokenUX(1)gaugesymmetry.AllthefermionYukawacouplingsexceptthatofthetopquarkareofO(10~(-2))inourmodel.Constraintsontheparameterspaceofthemodelfromlowenergyprocessesarestudied.Besides,thelightestoneoftheneutralfermionfields,whichisintroducedtocanceltheanomaliesoftheU(1)Xgaugesymmetrycanbethecolddarkmattercandidate.Weinvestigateitssignatureinthedarkmatterdirectdetection.

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A Three Higgs Doublet Model for Fermion Masses

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A Three Higgs Doublet Model for Fermion Masses

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