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Flipping away proton decay

Authors
Journal
Nuclear Physics B
0550-3213
Publisher
Elsevier
Publication Date
Volume
255
Identifiers
DOI: 10.1016/0550-3213(85)90157-9
Disciplines
  • Physics

Abstract

Abstract General conditions for the suppression of proton decay mediated by gauge boson exchange are considered. One appealing way to satisfy these conditions is to delay the unification of left-handed with right-handed quarks. The simplest grand unified theories which have a two-stage breaking of the gauge group to SU(3) × SU(2) × U(1) are discussed. A general analysis of gauge mediated ΔB ≠ 0 interactions is given for the various ways of embedding SU(6) × SU(2) × U(1) in the maximal subgroup of E 6. A model based on the SU(6) × SU(2) R subgroup of E 6 is considered in detail, and is shown to give a proton lifetime up to a few thousand times longer than in the minimal SU(5) theory.

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