Article

# Phenomenology of light Higgs bosons in supersymmetric left-right models

05/1999;

Source: arXiv

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**ABSTRACT:**Four different supersymmetric models based on SU(2)L×U(1)R×U(1)B-L and SU(2)L×SU(2)R×U(1)B-L gauge symmetry groups are studied. U(1)B-L symmetry is broken spontaneously by a vacuum expectation value (VEV) of a sneutrino field. The right-handed gauge bosons may obtain their mass solely by a sneutrino VEV. The physical charged lepton and neutrino are mixtures of gauginos, Higgsinos and lepton interaction eigenstates. Explicit formulas for masses and mixings in the physical lepton fields are found. The spontaneous symmetry-breaking mechanism fixes the trilinear R-parity breaking couplings. Only some special R-parity breaking trilinear couplings are allowed. There is a potentially large trilinear lepton number breaking coupling - which is unique to left-right models - that is proportional to the SU(2)R gauge coupling gR. The couplings are parametrized by few mixing angles, making spontaneous R-parity breaking a natural ``unification framework'' for R-parity breaking couplings in supersymmetric left-right models. - [Show abstract] [Hide abstract]

**ABSTRACT:**We discuss the implications of R parity breaking through spontaneous B-L breaking in left–right supersymmetric models. We give expressions for three generations of neutrino–neutralino and charged–lepton–chargino mixings. We find the masses of the light neutrinos at both the tree and one loop levels. We explore the most stringent bounds on the parameters of the LRSUSY model coming from rare leptonic processes. These phenomena severely restrict the parameters in both the R-parity violating and R-parity conserving sectors. We find that such models are likely to produce light doubly charged Higgs bosons and fermions, with masses as low as MΔ++,Δ̃++<~200 GeV for tanβ=1; however, the right-handed scale is restricted to be heavy, pushing the ZR mass above 160 TeV. - [Show abstract] [Hide abstract]

**ABSTRACT:**We investigate bounds from tree-level and one-loop processes in generic supersymmetric models with spontaneous R-parity breaking in the superpotential. We analyse the bounds from a general point of view. The bounds are applicable both for all models with spontaneous R-parity violation and for explicit bilinear R-parity violation based on general lepton-chargino and neutrino-neutralino mixings. We find constraints from semileptonic B, D and K decays, leptonic decays of the mu and tau, electric dipole moments, as well as bounds for the anomalous magnetic moment of the muon. Comment: 22 pages