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T: Fachverband Teilchenphysik
T 17: Beyond the Standard Model (Theorie) 4
T 17.7: Talk
Wednesday, March 6, 2013, 18:15–18:30, WIL-A124
Relic abundance calculation for generic neutralino LSP dark matter including Sommerfeld enhancements — Martin Beneke1, •Charlotte Hellmann1, and Pedro Ruiz-Femenia2 — 1TU Muenchen — 2IFIC Valencia
We set up a non-relativistic effective field theory for a set of slowly moving, nearly mass-degenerate but generically composed TeV scale neutralinos and charginos in the MSSM, providing a systematic expansion in the small velocities and mass-differences of the involved non-relativistic particles. In this framework we calculate Sommerfeld enhanced (co-)annihilation cross sections, that enter the thermal relic abundance calculation for a TeV scale neutralino LSP as promising cold dark matter candidate in the MSSM. Our approach includes the previously unknown off-diagonal annihilation matrix entries for a generic MSSM parameter space point and allows for the study of Sommerfeld enhanced P- and next-to-next-to leading order S-wave annihilations including terms proportional to mass-differences of the annihilating particles. We discuss the EFT setup as well as its application to the dark matter relic abundance calculation.