Grand Unification in High-scale Supersymmetry

Abstract

A constraint on masses of superheavy gauge and Higgs multiplets at the grand unification (GUT) scale is obtained from the gauge coupling unification in the case of high-scale supersymmetry. We found that all of the particles may lie around a scale of 10^16 GeV so that the threshold corrections to the gauge coupling constants at the GUT scale are smaller than those in the case of the low-energy supersymmetry. In addition, the GUT scale tends to be slightly lower when the gauginos are heavier and, thus, the proton decay rate via the X-boson exchange process is expected to be enhanced.

13 pages, 3 figures

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• Detectable dimension-6 proton decay in SUSY SO(10) GUT at Hyper-Kamiokande
• Low-Energy Probes of No-Scale SU(5) Super-GUTs
• Probing the high scale SUSY in CP violations of K, B0 and Bs mesons
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• Smallest Halos in Thermal Wino Dark Matter
• Probing Bino-Gluino Coannihilation at the LHC
• Precision gaugino mass measurements as a probe of large trilinear soft terms at ILC
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• Minimal Nambu-Goldstone Higgs Model in Supersymmetric SU(5) Revisited
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• The Existence of Dyon Solutions for Generalized Weinberg-Salam Model
• Probing the Supersymmetric Grand Unified Theories at the Future Proton-Proton Colliders and Hyper-Kamiokande Experiment
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