Erlangen 2026 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 101: Searches/BSM VI
T 101.4: Vortrag
Freitag, 20. März 2026, 09:45–10:00, KH 02.018
Search for an Intermediate-Mass Higgs Boson in the τ + τ Channel with Run 2 Data — •Luka Vomberg1, Christian Grefe2, Philip Bechtle1, and Klaus Desch1 — 1Physikalisches Institut Bonn, Käthe-Kümmel-Str. — 21, Esplanade des Particules, Meyrin, Switzerland
A search for additional Higgs bosons decaying to τ + τ in the intermediate mass range, as motivated by extended Higgs sector models such as the 2HDM, is presented. The analysis targets the τhad + τhad and τlep + τhad final states and considers both ggF and VBF production modes. Limits are derived on the production cross-section times branching ratio, following a model-independent approach.
This is the first ATLAS analysis probing the 80 GeV to 200 GeV mass range in the ττ final state using full Run 2 data, complementing existing high-mass searches. This analysis is a re-interpretation of the standard model H → ττ cross section measurement.
Preparations for a follow up analysis using run 3 data are ongoing, with the primary focus on improving suppression of the dominant Z → ττ background using spin sensitive observables to increase sensitivity in the low-mass region, as well as including effects of interference near the Z-pole.
Keywords: Higgs; BSM; ditau