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A new evaluation of the charged Higgs boson decay $H^+ -> W^+\gamma$ ispresented in the context of the general two-Higgs doublet model. A nonlinear$R_\xi$-gauge which considerably simplifies the calculation is introduced andsimple expressions are obtained for the fermionic and bosonic contributions.The $H^+ -> W^+\gamma$ branching ratio is analyzed for several values of theparameters of the model. Although this decay can have a branching fraction aslarge as $10^{-4}$ in a certain region of the parameter space, it is found thatsuch a region is disfavored by the most recent constraints on $b -> s\gamma$,$g-2$ of the muon, $Z -> b \bar b$, and the $\rho$ parameter, along with theexclusions from direct searches at the CERN $e^-e^+$ LEP collider. Thepossibility of detecting this decay at future colliders is discussed.Comment: 12 pages, 9 figure

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

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DecayH+→W+γin a nonlinearR