Uncertainties from Long Range Effects in $B \to K^* \gamma

Abstract

We reconsider the `long-range' component of the radiative transition $B\to K^{\ast }\gamma$. A careful analysis of the vector dominance amplitude $B\to V_1{V}_2\to V_1\gamma$ is carried out, with emphasis on the role of gauge invariance. The procedure for incorporating phenomenological $B\to V_1{V}_2$ data is identified and polarization data, only recently available, is employed to estimate the magnitude of the vector dominance effect. We summarize uncertainties in the $B\to K^{\ast }\gamma$ radiative transition produced by long-range effects and provide sugggestions for further experimental work.

Comments: Standard Latex file, 20 pgs (figures not included), UMHEP-411, UH-511-800-94