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Diffractive W and Z production at the Fermilab Tevatron

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review. D. 2010, vol. 82, no. 11, p. 112004
Abstract We report on a measurement of the fraction of events with a W or Z boson which are produced diffractively in pp 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.
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CDF COLLABORATION. Diffractive W and Z production at the Fermilab Tevatron. In: Physical Review. D, 2010, vol. 82, n° 11, p. 112004. https://archive-ouverte.unige.ch/unige:39118

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Deposited on : 2014-08-04

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