Speaker
Description
Talk Abstract Searching for Beyond Standard Model (BSM) physics is a key objective of the ATLAS experiment at the LHC. Many BSM scenarios, such as two-Higgs-doublet models (2HDM) and the Minimal Supersymmetric Standard Model (MSSM), predict additional Higgs bosons, including a charged Higgs boson (H±). In these models, the decay H±→τν is expected to have a significant branching fraction over a wide H± mass range. A major challenge in analyses involving reconstructed tau leptons is the estimation of backgrounds from jets misidentified as hadronically decaying taus. To address this, a dedicated data-driven fake factor method is employed. The talk presents the fake tau background estimation procedure in the context of the H±→τν search, along with the latest results from the full Run-II (2015–2018) dataset of √s=13 TeV proton–proton collisions recorded by the ATLAS detector. The presented constraints are the most stringent limits to date on charged Higgs boson production in the H±→τν channel.
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