Radiative corrections to stop-antistop annihilation

Abstract

We compute the full $\mathcal{O}({\alpha }_s)$ corrections to stop-antistop annihilation into two gluons and a light quark-antiquark pair within the framework of the Minimal Supersymmetric Standard Model (MSSM), including the non-perturbative Sommerfeld enhancement effect. Numerical results for the total annihilation cross section are shown and the effect on the neutralino relic density is discussed for an example scenario in the phenomenological MSSM.

Comments: 4 pages, 3 figures, contribution to the 2023 Electroweak session of the 57th Rencontres de Moriond