Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 48: BSM Higgs 2 (extended Higgs sectors)
T 48.1: Talk
Tuesday, March 5, 2024, 16:00–16:15, Geb. 30.41: HS 3
Revisiting the Yukawa Type I for the 2HDMS With a 95 GeV Higgs Boson Including the Recent Atlas Results — •Dominik Heintz1, Sven Heinemeyer3, Gudrid Moortgat-Pick1,2, and Cheng Li4 — 1II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 2DESY, Notkestraße 85, 22607 Hamburg, Germany — 3Instituto de Física Teórica UAM-CSIC, Cantoblanco, 28049, Madrid, Spain — 4School of Science, Sun Yat-Sen University, Gongchang Road 66, 518107 Shenzhen, China
The 2HDM (Two-Higgs-Doublet Model) can be extended by a real singlet, N2HDM, or a complex singlet, 2HDMS. Both models are promising candidates to describe the excess at ∼ 95 GeV observed both at CMS and at ATLAS in the γγ channel with ∼ 2.9σ and ∼ 1.7σ, respectively, as well as in the b b decay channel at LEP with ∼2.3σ. The lightest Higgs boson in the models, h1 was interpreted as a new particle at ∼ 95 GeV. Studies so far focused on the Yukawa types II and IV. However, the signal strength in the γγ channel went down substantially over the last year. This allows a greater freedom for ch1bb/ch1tt, the ratio of the coupling modifiers of the light Higgs to bottom and top quarks, respectively. This motivates the phenomenological study of the 2HDMS and N2HDM in the Yukawa type I. The study includes current theoretical and experimental constraints using HiggsTools (HiggsBounds and HiggsSignals) and incorporates the most recent signal rates from ATLAS.
Keywords: 2HDM; 2HDMS; N2HDM; Yukawa Type I; 95 GeV Higgs boson