Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 72: BSM Higgs 3 (extended Higgs sectors)
T 72.7: Talk
Wednesday, March 6, 2024, 17:30–17:45, Geb. 30.41: HS 3
Probing new frontiers: Unveiling Dark Matter with novel collider signatures in Type-I 2HDM+a — •Ilia Kalaitzidou1, Spyridon Argyropoulos1, and Ulrich Haisch2 — 1Physikalisches Institut, Universität Freiburg, Hermann-Herder Str. 3a, 79104 Freiburg, Germany Freiburg, Germany — 2Max Planck Institute for Physics, Föhringer Ring 6, 80805 München, Germany
One of the biggest unresolved mysteries in particle physics is the nature of dark matter (DM). It has long been suggested that the Standard Model (SM) Higgs sector, or extensions of it, could be a portal to DM. The Two Higgs Doublet Model with an additional pseudoscalar singlet acting as a mediator between the SM and DM particles (2HDM+a) is a promising model to explore the dark sector at the Large Hadron Collider (LHC). The present work studies a 2HDM+a with a moderately fermiophobic Type-I Yukawa sector and non-degenerate Higgs bosons. This model features a large region of parameter space that accommodates signatures poorly explored at the LHC. A sensitivity study for new experimental signatures is presented, extending to Higgs masses below the SM Higgs mass.
Keywords: 2HDM+a; Dark Matter