Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-04-11
Prog.Theor.Phys. 107 (2002) 433-441
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 2 figures, some references added
Scientific paper
A novel mechanism to realize the triplet-doublet splitting in supersymmetric SU(5) grand unified theories is proposed in the framework of higher dimensional theories where chiral multiplets are localized due to kink configuration of a SU(5) singlet. An adjoint Higgs field which spontaneously breaks the SU(5) gauge symmetry is assumed to be involved with the localization process, splitting the wave functions of the color-triplet Higgs from its doublet counterpart. The resulting effective four-dimensional theory does not possess manifest SU(5) invariance. By adjusting couplings, the doublet mass can be exponentially suppressed. We also show that dimension 5 proton decay from triplet Higgs exchange can be suppressed to a negligible level.
Kakizaki Mitsuru
Yamaguchi Masahiro
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