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  • Observation of diffractivel...
    Abazov, V.M.; Abbott, B.; Abdesselam, Abdelmalek; Abolins, M.; Abramov, V.; Acharya, B.S.; Adams, D.L.; Adams, M.; Ahmed, S.N.; Alexeev, G.D.; Alton, A.; Alves, G.A.; Anderson, E.W.; Arnoud, Y.; Avila, C.; Babintsev, V.V.; Babukhadia, L.; Bacon, T.C.; Baden, A.; Baffioni, S.; Baldin, B.; Balm, P.W.; Banerjee, S.; Barberis, E.; Baringer, P.; Barreto, J.; Bartlett, J.F.; Bassler, U.; Bauer, D.; Bean, A.; Beaudette, F.; Begel, M.; Belyaev, A.; Beri, S.B.; Bernardi, G.; Bertram, I.; Besson, A.; Beuselinck, R.; Bezzubov, V.A.; Bhat, P.C.; Bhatnagar, V.; Bhattacharjee, M.; Blazey, G.; Blekman, F.; Blessing, S.; Boehnlein, A.; Bojko, N.I.; Bolton, T.A.; Borcherding, F.; Bos, K.; Bose, T.; Brandt, A.; Briskin, G.; Brock, R.; Brooijmans, G.; Bross, A.; Buchholz, D.; Buehler, M.; Buescher, V.; Burtovoi, V.S.; Butler, J.M.; Canelli, F.; Carvalho, W.; Casey, D.; Castilla-Valdez, H.; Chakraborty, D.; Chan, K.M.; Chekulaev, S.V.; Cho, D.K.; Choi, S. K.; Chopra, S.; Claes, D.; Clark, A.R.; Coney, L.; Connolly, B.; Cooper, W.E.; Coppage, D.; Crepe-Renaudin, S.; Cummings, M.A.C.; Cutts, D.; da Motta, H.; Davis, G.A.; De, K.; de Jong, S.J.; Demarteau, M.; Demina, R.; Demine, P.; Denisov, D.; Denisov, S.P.; Desai, S.; Diehl, H.T.; Diesburg, M.; Doulas, S.; Dudko, L.V.; Duensing, S.; Duflot, L.; Dugad, S.R.; Duperrin, A.; Dyshkant, A.; Edmunds, D.

    Physics letters. B, 2003, Letnik: 574
    Journal Article

    Using the D0 detector, we have observed events produced in pbar-p collisions that contain W or Z bosons in conjunction with very little energy deposition (``rapidity gaps'') in large forward regions of the detector. The fraction of W boson events with a rapidity gap (a signature for diffraction) is 0.89\pm^{0.19}_{0.17}%, and the probability that the non-diffractive background fluctuated to yield the observed diffractive signal is 3 x 10^{-14}, corresponding to a significance of 7.5 sigma. The Z boson sample has a gap fraction of 1.44 \pm^{0.61}_{0.52}%, with a significance of 4.4 sigma. The diffractive events have very similar properties to the more common non-diffractive component.