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T: Fachverband Teilchenphysik
T 92: Higgs Boson: Extended Models 3
T 92.2: Talk
Thursday, March 24, 2022, 16:30–16:45, T-H23
Higgs Decay into Dark Matter in the CxSM at Next-to-Leading Order — •Felix Egle1, Margarete Mühlleitner1, Rui Santos2,3, and João Viana2 — 1Institute for Theoretical Physics, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany — 2Centro de Física Teórica e Computacional, Faculdade de Ciéncias, Universidade de Lisboa, Campo Grande, Edifício C8 1749-016 Lisboa, Portugal — 3ISEL - Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa 1959-007 Lisboa, Portugal
The Complex Singlet extension of the Standard Model (CxSM) is one of the simplest models to extend the scalar sector of the Standard Model (SM) and is also able to provide a suitable Dark Matter (DM) candidate. A possibility to probe the DM candidate at the LHC is given by the decay of the 125 GeV SM-like Higgs boson into a pair of DM particles. In order to match the experimental accuracy, higher-order corrections to this process have to be considered. We will present the computation of the complete next-to-leading order electroweak corrections to this decay process. In particular, we will describe the renormalization procedure for the CxSM, compare different renormalization schemes, discuss theoretical and experimental constraints on the input parameters and compare the results with current exclusion bounds.