Can we have a second light Higgs boson in the \(U(1)\) model?
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DOI:
https://doi.org/10.15625/0868-3166/22369Keywords:
beyond the standard model, extensions of electroweak Higgs sector, flavor constraints, Higgs phenomenology.Abstract
Our theoretical model predicts the existence of a light-mass CP-even Higgs boson (\(\mathcal{H}_1\)) and a light-mass pseudo-scalar boson (\(\mathcal{A}\)). The mass ranges for these particles are determined by the cubic coupling, \(\mu_4\), at the electroweak energy scale. These light Higgs bosons can produce flavor-changing neutral currents, which play a significant role in meson mixing processes. Specifically, when \(m_\mathcal{A} = s_\alpha m_{\mathcal{H}_1}\), the contributions to flavor mixing can either completely cancel each other out or, conversely, become extremely large.
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