  We report on a measurement of sigma(p-pbar to W+X) times B(W to tau+nu) in
p-pbar collisions at sqrt(s) = 1.8 TeV at the Fermilab Tevatron. The
measurement is based on an integrated luminosity of 18 pb^-1 of data collected
with the D0 detector during 1994-1995. We find that sigma(p-pbar to W+X) times
B(W to tau+nu) = 2.22 +- 0.09 (stat) +- 0.10 (syst) +- 0.10 (lum) nb. Lepton
universality predicts that the ratio of the tau and electron electroweak
charged current couplings to the W boson, g_tau^W / g_e^W, be unity. We find
g_tau^W / g_e^W = 0.980 +- 0.031, in agreement with lepton universality.

High Energy Physics - Experiment