New constraint on the minimal SUSY GUT model from proton decay
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چکیده
We present results of reanalysis on proton decay in the minimal SU(5) SUSY GUT model. Unlike previous analyses, we take into account a Higgsino dressing diagram of dimension 5 operator with right-handed matter fields (RRRR operator). It is shown that this diagram gives a significant contribution for p → Kντ . Constraints on the colored Higgs mass MC and the sfermion mass mf̃ from SuperKamiokande limit become considerably stronger than those in the previous analyses: MC > 6.5× 10 16 GeV for m f̃ < 1TeV. The minimal model with m f̃ < ∼ 2TeV is excluded if we require the validity of this model up to the Planck scale.
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تاریخ انتشار 1999