We report on a measurement of the fraction of events with a
W or Z boson produced diffractively in p anti-p collisions at s**(1/2)
ñ.96 TeV, using data from 0.6 fb-1 of integrated luminosity collected
with the CDF II detector equipped with a Roman-pot spectrometer that
detects the p-bar from p-bar + p --> p-bar + [X + W/Z]. We find
that (0.97 +/- 0.11)% of Ws and (0.85 +/- 0.22)% of Zs are produced
diffractively in a region of (anti)proton fractional momentum loss xi of
0.03 < xi < 0.10 and 4-momentum transferred squared t of -1 <
t < 0 (GeV/c)2. We also report on searches for W and Z production
in double Pomeron exchange, p + p-bar --> p+[X + W/Z] + p-bar, and
on exclusive Z production, p-bar + p --> p-bar + Z + p. No signal
is seen above background for these processes, and comparisons are made
with expectations.
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Updated: Friday, 2010 December 17 13:50:42 CST automatically from input from Carol Picciolo