W-Boson Production inνμ+p→μ+W+Γ

The cross section for the production of the (hypothetical) intermediate vector boson of weak interactions ($W$ boson) in the reaction ${\nu }_{\mu }+p\to \mu +W+\Gamma$, where $\Gamma$ is a hadronic state unassociated with nucleon resonances, is calculated. The input to the numerical calculation is derived from analyzed results of the recent SLAC deep-inelastic $e-p$ scattering experiment. Owing to the mild momentum-transfer dependence of the observed $\gamma p\Gamma$ vertex, the resulting $W$-boson production cross section is found to be important only near threshold and to contribute a non-negligible amount to the total production cross section if the ratio of $W$-boson mass to nucleon mass is much larger than 1.