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arXiv · 2404.06397

New Contributions to $b \to s \gamma $ in Minimal G2HDM

Che Hao Liu·Van Que Tran·Qiaoyi Wen·Fanrong Xu·Tzu-Chiang Yuan
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Abstract

We study the flavor-changing bottom quark radiative decay $b \to s \gamma$ induced at one-loop level within the minimal gauged two-Higgs-doublet model (G2HDM). Among the three new contributions to this rare process in G2HDM, we find that only the charged Higgs $\mathcal{H^\pm}$ contribution can be constrained by the current global fit data in $B$-physics. Other two contributions from the complex vectorial dark matter $\mathcal{W}$ and dark Higgs $\mathcal{D}$ are not sensitive to the current data. Combining with theoretical constraints imposed on the scalar potential and electroweak precision data for the oblique parameters, we exclude mass regions $m_{\mathcal{H}^\pm} \lesssim 250$ GeV and $m_{\mathcal{D}} \lesssim 100$ GeV at the 95\% confidence level.

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Che Hao Liu, Van Que Tran, Qiaoyi Wen, Fanrong Xu, Tzu-Chiang Yuan. 2024-04-09. New Contributions to $b \to s \gamma $ in Minimal G2HDM. https://doi.org/10.1088/1674-1137/add873

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