Possible huge enhancement in the radiative decay of the weal W boson into the charmed $D_s$ meson

Abstract

We point out that the rare decay mode $W^{\pm }\to \gamma +D_s^{\pm }$ could be spectacularly enhanced, with a branching ratio around $10^{-6}$ which is three order of magnitude larger than previous predictions. Its observation will determine the W boson mass with great accuracy, providing additional high precision tests of the standard model, as well as reveal eventual deviation from the trilinear non-abelian gauge coupling.

Comments: 14, PAR/LPTHE 93 - 05