How light a higgsino or a wino dark matter can become in a compressed scenario of MSSM

Understand

Higgsinos and Wino have strong motivations for being Dark Matter (DM) candidates in supersymmetry, but their annihilation cross sections are quite large.

• For thermal generation and a single component DM setup the higgsinos or wino may have masses of around 1 or 2-3 TeV respectively.
• For such DM candidates, a small amount of slepton coannihilation may decrease the effective DM annihilation cross section.
• This, in turn reduces the lower limit of the relic density satisfied DM mass by more than 50%.