Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 41: Search for Dark Matter II

T 41.7: Vortrag

Dienstag, 1. April 2025, 17:45–18:00, VG 4.102

Next-to-Leading-Order QCD Corrections to Dark Matter Annihilation into Wqq' in the CxSM — •Pavao Brica — Karlsruher Institut für Technologie, Karlsruhe, Deutschland

I will present the results for our computation of the next-to-leading-order QCD corrections to the annihilation process of two dark matter particles into a W boson, a massless quark and a massless antiquark. This process contributes to the computation of the dark matter relic density. The calculation has been performed within the framework of the complex singlet extension of the Standard Model which extends the Standard Model scalar sector by a complex singlet and yields an appropriate dark matter candidate. The treatment of the UV and IR divergences that arise in the calculation is briefly addressed. The cross section as well as the relic density are presented at next-to-leading order. The impact of these corrections is analyzed.

Keywords: CxSM; relic density