Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 34: Extended Higgs models I

T 34.3: Talk

Tuesday, March 16, 2021, 16:30–16:45, Ti

Exotic Higgs Decays: ATLAS Analysis of Asymmetric Higgs Decays to Two Light Scalars — •Judith Höfer, Claudia Seitz, Rickard Ström, Priscilla Pani, and Beate Heinemann — DESY, Hamburg, Germany

Extensions of the SM Higgs sector featuring one or several singlet scalar fields are realised in many BMS models. While several searches have been performed targeting decays of the SM Higgs boson to two light scalars of the same mass, the asymmetric decay to two new spin-zero particles of different mass is largely unexplored. The successive decays of these particles can give rise to spectacular high-multiplicity collider signatures, including so-called cascade decays, where the heavier of the scalars decays into the lighter one.

The talk discusses the progress of an analysis studying these asymmetric decays with the ATLAS experiment at the Large Hadron Collider, CERN. The analysis focuses on the VH production mode and the channel where the scalars decay to b-quarks, resulting in a challenging low-pT jet final state. These signatures profit largely from the experiences gained with the equivalent symmetric analysis and motivate the use of novel reconstruction techniques.