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T: Fachverband Teilchenphysik
T 4: Dark matter: theory
T 4.4: Vortrag
Montag, 30. März 2020, 17:15–17:30, H-HS II
Higher-Order Electroweak Corrections to Dark Matter Direct Detection in the Dark Complex Extension of the Standard Model — Seraina Glaus1,2, Margarete Mühlleitner1, Jonas Müller1, Shruti Patel1,2, •Tizian Römer1, and Rui Santos3,4 — 1Institute for Theoretical Physics, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany — 2Institute for Nuclear Physics, Karlsruhe Institute of Technology, 76344 Karlsruhe, Germany — 3Centro de Física Téorica e Computacional, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Edifício C8 1749-016 Lisboa, Portugal — 4ISEL - Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa 1959-007 Lisboa, Portugal
While there is evidence for the existence of Dark Matter, its nature remains unknown. Assuming Dark Matter being constituted of weakly interacting particles, we investigate a minimal extension of the Standard Model, the Dark Complex extension of the Standard Model (DCxSM). In the DCxSM, an additional complex scalar field with a softly broken U(1) symmetry gives rise to a massive pseudo Nambu-Goldstone boson, which is the Dark Matter candidate. We compute the electroweak corrections for the spin-independent direct detection process of this Dark Matter candidate. Since the leading-order cross section of this process vanishes in the non-relativistic limit, the electroweak corrections are essential to discuss the sensitivity of the experimental results of Xenon-1T. We will present the phenomenological implications of the electroweak corrections for the direct detection limits.