Light Higgsino dark matter in the MSSM on D-branes

Abstract

When supersymmetry breaking is dominated by the complex structure moduli and the universal dilaton, a subset of the supersymmetry parameter space in a realistic MSSM constructed from intersecting/magnetized D-branes are universal, similar to the effective mSUGRA/CMSSM parameter space with a universal scalar mass m 0 , a universal gaugino mass m 1/2 and with the universal trilinear term fixed to be minus the gaugino mass, A 0 = −m 1/2 . More generally, the scalar mass-squared terms for sfermions are split about the Higgs mass