Split Supersymmetry Under GUT and Current Dark Matter Constraints

Abstract

We recalculate the two-loop beta functions for three gauge couplings taking into account all low energy threshold corrections in split supersymmetry (split-SUSY) which assumes a very high scalar mass scale M_S. We find that, in split-SUSY with gaugino mass unification assumption and a large M_S, the gauge coupling unification requires a lower bound on gaugino mass. Combined with the constraints from the dark matter relic density and direct detection limits, we find that split-SUSY is very restricted and for dark matter mass below 1 TeV the allowed parameter space can be fully covered by XENON-1T(2017).

20 pages, 7 figures, more details added

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• Gaugino masses from misaligned supersymmetry breaking and R-symmetry breaking spurions
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• PandaX limits on light dark matter with light mediator in the singlet extension of MSSM
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