%0 Journal Article
%T Non-relativistic pair annihilation of nearly mass degenerate neutralinos and charginos III. Computation of the Sommerfeld enhancements
%A Beneke, M.
%A Hellmann, C.
%A Ruiz-Femenia, P.
%J Journal of High Energy Physics
%D 2015
%V 05
%N 5
%I Springer
%@ 1029-8479
%G English
%F Beneke_etal2015
%O WOS:000354959300001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2235), last updated on Thu, 11 Jun 2015 20:13:18 +0000
%X This paper concludes the presentation of the non-relativistic effective field theory formalism designed to calculate the radiative corrections that enhance the pair-annihilation cross sections of slowly moving neutralinos and charginos within the general minimal supersymmetric standard model (MSSM). While papers I and II focused on the computation of the tree-level annihilation rates that feed into the short-distance part, here we describe in detail the method to obtain the Sommerfeld factors that contain the enhanced long-distance corrections. This includes the computation of the potential interactions in the MSSM, which are provided in compact analytic form, and a novel solution of the multi-state Schrodinger equation that is free from the numerical instabilities generated by large mass splittings between the scattering states. Our results allow for a precise computation of the MSSM neutralino dark matter relic abundance and pair-annihilation rates in the present Universe, when Sommerfeld enhancements are important.
%K Cosmology of Theories beyond the SM
%K Supersymmetric Standard Model
%K Nonperturbative Effects
%R 10.1007/JHEP05(2015)115
%U http://arxiv.org/abs/1411.6924
%U https://doi.org/10.1007/JHEP05(2015)115
%P 115-57pp