Relic density at one-loop with gauge boson pair production

Abstract

We have computed the full one-loop corrections (electroweak as well as QCD) to processes contributing to the relic density of dark matter in the minimal supersymmetric standard model where the lightest supersymmetric particle is the lightest neutralino. We cover scenarios where the most important channels are those with gauge boson pair production. This includes the case of a bino with some wino admixture, a Higgsino and a wino. In this paper we specialize to the case of light dark matter much below the TeV scale. The corrections can have a non-negligible impact on the predictions and should be taken into account in view of the present and forthcoming increasing precision on the relic density measurements. Our calculations are made with the help of SLOOPS, an automatic tool for the calculation of one-loop processes in the minimal supersymmetric standard model. The renormalization scheme dependence of the results as concerns $\mathrm{tan}\ensuremath{\beta}$ is studied.