Freeze-in bino dark matter in high scale supersymmetry

Abstract

We explore a scenario of high scale supersymmetry where all supersymmetric particles except gauginos stay at a high energy scale $M_{\mathrm{SUSY}}$ which is much larger than the reheating temperature $T_{\text{RH}}$. The dark matter is dominated by bino component with mass around the electroweak scale and the observed relic abundance is mainly generated by the freeze-in process during the early universe. Considering the various constraints, we identify two available scenarios in which the supersymmetric sector at an energy scale below $T_{\text{RH}}$ consists of: a) bino; b) bino and wino. Typically, for a bino mass around 0.1-1 TeV and a wino mass around 2 TeV, we find that $M_{\mathrm{SUSY}}$ should be around $10^{12-14}$ GeV with $T_{\text{RH}}$ around $10^{4-6}$ GeV.

23 pages, 4 figures, revised version accepted by Physical Review D for publication