Asymmetric Higgs Sector and Neutrino Mass in an SU(2)_R Model

Abstract

The asymmetric Higgs sector of one $SU(2)_L \times SU(2)_R$ bidoublet $(ϕ_1^0,ϕ_1^-;ϕ_2^+,ϕ_2^0)$ and one $SU(2)_R$ doublet [but no $SU(2)_L$ doublet] is considered in a nonsupersymmetric left-right extension of the standard model (SM) of particle interactions. The inverse seesaw mechanism for neutrino mass is naturally implemented with the addition of fermion singlets, allowing thereby the possibility of breaking $SU(2)_R$ at the TeV scale. In the limit $v_2 = < ϕ_2^0 > = 0$, the unavoidable flavor-changing neutral Higgs couplings to quarks are studied and shown to be naturally suppressed in $K-\bar{K}$ and $B-\bar{B}$ mixing, as well as in $b \to s γ$. All particles are consistent with having masses less than 1 TeV, and could be observable at the Large Hadron Collider (LHC).

17 pages, 1 figure. FCNC bounds corrected. Additional references included