2025/05/08 by Tanmoy Mondal, Mondal, Tanmoy, Kei Yagyu +1 · 1 citation
Computer Science · Physics and Astronomy · #Boson #Computational Physics and Python Applications #FOS: Physical sciences #Higgs boson #Higgs mechanism #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Observable #Particle physics theoretical and experimental studies #Standard Model (mathematical formulation) #Unitarity #Yukawa potential
paper · pdf · doi:10.48550/arxiv.2505.05104
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2025/05/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the implications of spontaneous CP-violation in the general two Higgs doublet model, which leads to a non-decoupling structure of the Higgs sector. All the masses of the Higgs bosons are purely determined by the vacuum expectation value of the Higgs fields, and are thus constrained to be smaller than \cal O(500) GeV by the perturbative unitarity bound. Such a non-decoupling nature predicts sizable deviations from the standard model expectations in the observables of the discovered Higgs boson (h). We find that the magnitude of deviations in \cal Bh → γγ (\cal Bh → Zγ) are larger than ∼ 10%~(4%) in the Higgs alignment limit. Moreover, we show that a robust correlation emerges between the deviations in the one-loop corrected hhh coupling and \cal Bh → γγ to be, e.g., 200%~(50%) and -10.3% (-10.8%), respectively, under the constraints from theoretical bounds and current experimental data. Using a few benchmark points, we highlight that flavor-violating decays of the additional Higgs bosons can be sizable due to the constrained structure of the Yukawa interactions.