English

Relic density at one-loop with gauge boson pair production

High Energy Physics - Phenomenology 2010-04-06 v3

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 MSSM where the LSP 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 specialise 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 MSSM. The renormalisation scheme dependence of the results as concerns \tgb\tgb is studied.

Keywords

Cite

@article{arxiv.0910.3293,
  title  = {Relic density at one-loop with gauge boson pair production},
  author = {N. Baro and F. Boudjema and G. Chalons and Sun Hao},
  journal= {arXiv preprint arXiv:0910.3293},
  year   = {2010}
}

Comments

25 pages, 10 figures, Citations added

R2 v1 2026-06-21T13:59:38.622Z