DiffractiveWandZproduction at the Fermilab Tevatron

T. Aaltonen, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, M. G. Albrow, G. Apollinari, J. A. Appel, A. Apresyan, T. Arisawa (+503 others)
2010 Physical Review D  
We report on a measurement of the fraction of events with a W or Z boson which are produced diffractively in antiproton-proton collisions at a center of mass energy of 1.96 TeV, using data from 0.6 inverse femtobarns of integrated luminosity collected with the CDF-II detector equipped with a Roman-pot spectrometer that detects the antiproton (pbar) from pbar+p --> pbar+[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
more » ... ton fractional momentum loss (\xi) of 0.03<\xi<0.10 and 4-momentum transferred squared t of -1 [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+pbar --> p+[X+W/Z]+pbar, and on exclusive Z production, pbar+p --> pbar+Z+p. No signal is seen above background for these processes, and comparisons are made with expectations.
doi:10.1103/physrevd.82.112004 fatcat:vg3eujtgljdh5am5a37n23hele