A Reexamination of Proton Decay in Supersymmetric Grand Unified Theories

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dc.creatorBabu, K. S.
dc.creatorStrassler, M. J.
dc.date1998-08-27
dc.date.accessioned2026-07-07T04:04:37Z
dc.date.available2026-07-07T04:04:37Z
dc.descriptionWe reconsider dimension-five proton decay operators, making semi-quantitative remarks which apply to a large class of supersymmetric GUTs in which the short-distance operators are correlated with the fermion Yukawa couplings. In these GUTs, which include minimal SU(5), the operators $(u^cd_i^c)^\dagger(d_jν_τ)$, induced by charged Higgsino dressing, completely dominate for moderate to large $\tanbeta$. The rate for $p \rarr (K^+,π^+) \barν_τ$ grows rapidly, as $\tanbeta^4$, and the K^+ to π^+ branching ratio can often be precisely predicted. At small $\tanbeta$ the operators $(u d_i)(d_j ν)$ are dominant, while the operators $(u d_i)(u \ell^-)$, with left-handed charged leptons, are comparable to the neutrino operators in the generic GUT and suppressed in minimal GUTs. Charged-lepton branching fractions are always small at large $\tanbeta$. The electron to muon ratio is small in minimal GUTs but can be larger, even of order one, in other models. All other operators are very small. At small $\tanbeta$ in non-minimal GUTs, gluino and neutralino dressing effects on neutrino rates are not negligible.
dc.description10 pages, 3 figures, uses revtex
dc.identifierhttps://arxiv.org/abs/hep-ph/9808447
dc.identifierhttp://arxiv.org/abs/hep-ph/9808447
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/48172
dc.subjectHigh Energy Physics - Phenomenology
dc.titleA Reexamination of Proton Decay in Supersymmetric Grand Unified Theories
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