Implications of the lepton--Higgs-boson generation symmetry in a supersymmetric left-right gauge model

Journal Article · Wed Jul 01 04:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.418· OSTI ID:7206100

Umemura, I; Yamamoto, K ^[1]

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1. Department of Nuclear Engineering, Kyoto University, Kyoto 606 (Japan)

Some remarkable issues are investigated concerning an unconventional type of supersymmetric left-right gauge model, where the fields with different lepton numbers are accommodated together in the SU(2){sub {ital R}} multiplets. The phenomenology of the model is restricted by the generation symmetry in the lepton--Higgs-boson sector which is required to suppress enough the flavor-changing neutral currents mediated by the Higgs fields. The mass matrix of the neutralinos, in particular, has a certain form depending on the possible choices of the generation symmetry. The lightest state {ital {tilde N}}{sub LSP} is then found to consist almost entirely of the SU(2){sub {ital L}}{times}U(1){sub {ital Y}}-singlet neutralinos which form the SU(2){sub {ital R}} doublets together with the right-handed charged leptons. {ital {tilde N}}{sub LSP} acquires a mass at most {similar to}1 GeV or even much smaller for most choices of the generation symmetry. It hence may be identified with the lightest supersymmetric particle. Some stringent constraints on the model are obtained from the astrophysical and cosmological effects of such an {ital {tilde N}}{sub LSP}. The decays of superparticles would also look somewhat different, where {ital {tilde N}}{sub LSP} is produced in the final state.

• OSTI ID: 7206100
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:1; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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