Natural suppression of Higgsino mediated proton decay in supersymmetric SO(10)
May, 199339 pages
Published in:
- Phys.Rev.D 48 (1993) 5354-5364
e-Print:
- hep-ph/9306242 [hep-ph]
Report number:
- BA-93-26
Citations per year
Abstract:
In supersymmetric Grand Unified Theories, proton decay mediated by the color--triplet higgsino is generally problematic and requires some fine--tuning of parameters. We present a mechanism which naturally suppresses such dimension 5 operators in the context of SUSY . The mechanism, which implements natural doublet--triplet splitting using the adjoint higgs, converts these dimension 5 operators effectively into dimension 6. By explicitly computing the higgs spectrum and the resulting threshold uncertainties we show that the successful prediction of is maintained {\it as a prediction} in this scheme. It is argued that only a weak suppression of the higgsino mediated proton decay is achievable within SUSY without fine--tuning, in contrast to a strong suppression in SUSY .- grand unified theory: SO(10)
- grand unified theory: SU(5) x U(1)
- supersymmetry
- p: decay
- decay: p
- postulated particle: Higgsino
- color: triplet
- symmetry breaking: gauge
- Higgs particle: doublet
- Higgs particle: triplet
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