Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 62: Higgs Boson: Extended Models 2
T 62.2: Vortrag
Mittwoch, 23. März 2022, 16:30–16:45, T-H21
Search for charged Higgs bosons in the H+→ Wh→ qqbb decay channel — •Shubham Bansal, Jochen Dingfelder, and Tatjana Lenz — Physikalisches Institut, Universität Bonn
After the discovery of the Higgs boson at a mass of 125 GeV, the last missing piece of the Standard Model (SM) might be found. On the other hand, various theories beyond the SM predict additional Higgs bosons, one of which could be the found Higgs boson at 125 GeV. One such example is the two-Higgs-Doublet Model (2HDM) that features an extended scalar sector including the existence of charged Higgs bosons (H+). The observation of such a charged scalar particle would clearly indicate physics beyond the SM. The H+ production mechanism depends on its mass (mH+) and for mH+> mt+mb, the leading H+ production mode is the associated production with a top and a bottom quark via gg → tbH+. In the alignment limit for 2HDM, the dominant decay mode is H+→ tb. However, in models like N2HDM and the Georgi-Machacek (GM) model, it is possible to obtain a sizable branching ratio for H+→ Wh.
This talk presents a search for charged Higgs bosons in H+→ Wh→ qqbb decays. The recent developments of the analysis strategy will be discussed, which include the use of boosted decision trees to reconstruct the H+, data-driven corrections to improve the modeling of the main background, tt, the definition of signal-enriched and -depleted regions, and a first estimate of the expected sensitivity using the full Run-2 ATLAS dataset.