2016•Nuclear Physics BOpen access

Threshold corrections to dimension-six proton decay operators in non-minimal SUSY SU(5) GUTs

Borut Bajc, Junji Hisano, Takumi Kuwahara, Yuji Omura

Abstract

We calculate the high and low scale threshold corrections to the D=6 proton decay mode in supersymmetric SU(5) grand unified theories with higher-dimensional representation Higgs multiplets. In particular, we focus on a missing-partner model in which the grand unified group is spontaneously broken by the 75-dimensional Higgs multiplet and the doublet–triplet splitting problem is solved. We find that in the missing-partner model the D=6 proton decay rate gets suppressed by about 60%, mainly due to the threshold effect at the GUT scale, while the SUSY-scale threshold corrections are found to be less prominent when sfermions are heavy.

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Key concepts: Proton decay, Multiplet, Physics, Higgs boson, Supersymmetry, Particle physics, Dimension (graph theory), SO(10)