TY  - JOUR
AU  - Beneke, M.
AU  - Hellmann, C.
AU  - Ruiz-Femenia, P.
PY  - 2015
DA  - 2015//
TI  - Non-relativistic pair annihilation of nearly mass degenerate neutralinos and charginos III. Computation of the Sommerfeld enhancements
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 115
EP  - 57pp
VL  - 05
IS  - 5
PB  - Springer
KW  - Cosmology of Theories beyond the SM
KW  - Supersymmetric Standard Model
KW  - Nonperturbative Effects
AB  - 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.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1411.6924
UR  - https://doi.org/10.1007/JHEP05(2015)115
DO  - 10.1007/JHEP05(2015)115
LA  - English
N1  - WOS:000354959300001
ID  - Beneke_etal2015
ER  -