F. Abe et al., SEARCH FOR THE RARE DECAY W-+ --]PI(+/-)+GAMMA IN PROTON-ANTIPROTON COLLISIONS AT ROOT-S=1.8 TEV - ART. NO. 031101/, Physical review. D. Particles and fields, 5803(3), 1998, pp. 1101
We have searched for the rare decay W+/- --> pi(+/-) + gamma in 83 pb(
-1) of data taken in proton-antiproton collisions at root s = 1.8 TeV
with the Collider Detector at Fermilab. We find three events in the si
gnal region and estimate the background to be 5.2+/-1.5 events. We set
a 95% confidence level upper limit of 7 x 10(-4) on the ratio of part
ial widths, Gamma(W+/- --> pi(+/-) + gamma)/Gamma(W+/- --> e(+/-) + nu
). [S0556-2821(98)50115-4]