Göttingen 2012 – scientific programme

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T: Fachverband Teilchenphysik

T 20: Astroteilchenphysik und Kosmologie (Theorie)

T 20.4: Talk

Monday, February 27, 2012, 17:30–17:45, VG 3.101

Sommerfeld enhancement effect in neutralino relic abundance calculations — Martin Beneke¹, •Charlotte Hellmann¹, and Pedro Ruiz-Femenia² — ¹TTK, Aachen University — ²IFIC, Valencia University

We address the Sommerfeld enhancement effect in neutralino dark matter relic abundance calculations in the MSSM using non-relativistic effective field theory techniques.

Our work includes an analytical calculation of all S- and P-Wave (co-)annihilation rates with nearly mass degenerate particles in the neutralino/chargino sector up to order v² in the velocity expansion, where we especially account for off-diagonal annihilation reactions. All spin-dependent and spin-independent potential interactions through Higgs and gauge boson exchange are taken into account and annihilations into all accessible Higgs and standard model final states are considered.

We present numerical results for selected realistic MSSM scenarios.