New contributions to <i>b</i> → <i>sγ</i> in the minimal G2HDM*

Abstract We study flavor-changing bottom quark radiative decay induced at the 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 contribution can be constrained by the current global fit data in B -physics. The other two contributions from complex vectorial dark matter and dark Higgs are not sensitive to the current data. Incorporating theoretical constraints imposed on the scalar potential and electroweak precision data for the oblique parameters, we exclude mass regions GeV and GeV at the 95% confidence level.