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- W2171238662 abstract "We report on a measurement of the fraction of events with a W or Z boson which are produced diffractively in p¯p collisions at s=1.96 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¯ from p¯+p→p¯+[X+W/Z]. We find that (1.00±0.11)% of Ws and (0.88±0.22)% of Zs are produced diffractively in a region of antiproton or proton fractional momentum loss ξ of 0.03<ξ<0.10 and 4-momentum transferred squared t of −1<t<0 (GeV/c)2, where we account for the events in which the proton scatters diffractively while the antiproton dissociates, p¯+p→[X+W/Z]+p, by doubling the measured proton dissociation fraction. We also report on searches for W and Z production in double Pomeron exchange, p+p¯→p+[X+W/Z]+p¯, and on exclusive Z production, p¯+p→p¯+Z+p. No signal is seen above background for these processes, and comparisons are made with expectations.Received 29 July 2010DOI:https://doi.org/10.1103/PhysRevD.82.112004© 2010 The American Physical Society" @default.
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