Large Higgs boson exchange contribution in three-body neutralino decays

We show that the Higgs boson exchange contribution can be large in three-body decays of neutralinos even in the case of small tanβ. This enlarges the branching ratios for the decays χ̃02→χ̃01 b b̄ and χ̃02→χ̃01 τ−τ+. This is the case in the region of the parameter space where the two lightest neutralinos are gaugino-like, the sfermions are heavier than 300 GeV, and mA0≲200 GeV.