Upper Bound of the Proton Lifetime in Product-Group Unification
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چکیده
Models of supersymmetric grand unified theories based on the SU(5)GUT×U(N)H gauge group (N = 2, 3) have a symmetry that guarantees light Higgs doublets and the absence of dimension-five proton-decay operators. We analysed the proton decay induced by the gauge-boson exchange in these models. Upper bounds of proton lifetime are obtained; τ(p → πe)∼ 6.0 × 1033 yrs in the SU(5)GUT×U(2)H model and τ(p → πe)∼ 5.3 × 1035 yrs in the SU(5)GUT×U(3)H model. Various uncertainties in the predictions are also discussed.
منابع مشابه
Upper Bound of Proton Life-Time in Product-Group Unification
Models of supersymmetric grand unified theories based on SU(5)GUT×U(N)H gauge group (N = 2, 3) have a symmetry that guarantees light two Higgs doublets and absence of dimension-five proton decay operators. We analysed the proton decay induced by gauge-boson exchange in the models. Upper bounds of proton life-time are obtained; τ(p → πe)∼ 6.0×1033 yrs. in the SU(5)GUT×U(2)H model and τ(p → πe)∼ ...
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تاریخ انتشار 2003