About
New massive scalar or pseudo-scalar states with strong couplings to the top quark are predicted in numerous extensions of the Standard Model. These include models with an extended Higgs sector, such as Two-Higgs-Doublet Models (2HDMs). In this seminar, three recent searches for new scalar and pseudo-scalar particles with couplings to the top quark using the full Run-2 dataset are presented. Final states with two, three or four top quarks, targeting production of the heavy Higgs-like states via gluon-gluon fusion (gg→A/H), associated production with a top-quark (tA/H) or with a top-antitop-quark pair (tt̄A/H), as well as the t-channel production resulting in a same-sign top-quark pair are considered. The gg→A/H→tt̄ search takes into account interference with the SM process and provides the first full Run-2 search of this kind at the LHC. Searches in final states with more than two top quarks make use of neural networks, and provide the first collider result in a general 2HDM, with the heavy scalar featuring flavour changing couplings, including the first dedicated search featuring three top quarks.
Refreshments will be served at 10:30 .
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The talk
Credits and licence
- Institution
- CERN
- Department
- LHC Seminar
- Speaker
- Janna Katharina Behr
- Year
- 2024
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed