Dortmund 2021 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 59: Extended Higgs models II
T 59.8: Vortrag
Mittwoch, 17. März 2021, 17:45–18:00, Ti
Search for charged Higgs bosons in H+→ Wh→ qqbb decay channel — •Shubham Bansal, Jochen Dingfelder, and Tatjana Lenz — Physikalisches Institut, Universität Bonn
The observation of a heavy charged scalar particle (H+) would clearly indicate physics beyond the Standard Model. Charged Higgs bosons are predicted by several non-minimal Higgs scenarios, one of which is the two-Higgs-Doublet Model (2HDM). The H+ production mechanism and decay modes at the tree level depend on its mass (mH+) and two parameters namely, α, the mixing angle between the neutral CP-even Higgs bosons, and tanβ, the ratio of the vacuum expectation values of the two Higgs doublets.
For mH+ > mt+mb, the leading production mode of H+ at the LHC is the associated production with a top and a bottom quark via gg → tbH+, and in the alignment limit for 2HDM when cos (β-α) ≈ 0, the dominant decay mode is H+→ tb. Nevertheless, it is possible to attain sizable branching ratios for H+→ Wh in the 2HDM scenarios where the 125 GeV Higgs is the heaviest CP-even scalar, and in a few other scenarios such as the N2HDM and the Georgi-Machacek (GM) model. This talk focuses on the first studies of the H+→ Wh→ qqbb decay channel in ATLAS Run-2 data.