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T: Fachverband Teilchenphysik

T 78: Higgs: Extended models

T 78.8: Vortrag

Donnerstag, 2. April 2020, 18:15–18:30, H-HS XVI

Studies of an Extended Higgs Sectors — •Judith Höfer, Claudia Seitz, Rickard Ström, Priscilla Pani, and Beate Heinemann — Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany

The Higgs particle is a vital part of the current Standard Model (SM) of particle physics. Since its discovery, the measurements of its properties have confirmed the SM predictions. However, astrophysical observations hint towards the existence of physics Beyond the Standard Model (BSM) to explain, for example, phenomena like dark matter and baryon asymmetry. An extended Higgs sector is a prominent candidate to provide a connection between this BSM physics and the SM. Since the current measurements of the Higgs boson are limited in precision, they still provide sizeable space for such an extension of the Higgs sector. Here, an extension of the SM Higgs doublet by two additional scalar particles is considered. Depending on the mass of these new particles, processes where the 125 GeV SM Higgs decays into two new scalar particles can occur. In addition, asymmetric decays and successive cascade decays of the new Higgs particles are considered and their novel collider signatures are explored in the context of the ATLAS experiment at the Large Hadron Collider, CERN.