Erlangen 2026 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 99: Searches/BSM V
T 99.1: Vortrag
Freitag, 20. März 2026, 09:00–09:15, KH 02.014
Next-to-Leading-Order QCD and EW Corrections to the Dark Matter Relic Density in the Framework of the CxSM — •Pavao Brica1, Karim El Yaouti1, Pedro Gabriel2, Milada Margarete Mühlleitner1, and Rui Santos2 — 1Karlsruher Institut für Technologie — 2Universidade de Lisboa
This talk presents the computation of the next-to-leading-order (NLO) QCD and electroweak (EW) corrections to the annihilation of dark matter particles into the dominant final states, processes that play a key role in determining the dark matter relic density. The analysis is performed within the Complex Singlet Extension of the Standard Model (CxSM), which enlarges the Standard Model scalar sector by a complex singlet field and provides a viable dark matter candidate. The treatment of the ultraviolet (UV) and infrared (IR) divergences encountered in the calculation is briefly discussed. The relic density is evaluated at NLO accuracy, and the impact of the QCD and EW corrections on the final prediction is examined together with its phenomenological implications.
Keywords: Dark Matter; Next-to-Leading Order Calculation; Relic Density; Computational Phvsics