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  • Observation of diffractivel...
    Abbott, B.; Abolins, M.; Alexeev, G.D.; Babukhadia, L.; Baldin, B.; Barreto, J.; Belyaev, A.; Bertram, I.; Beuselinck, R.; Bezzubov, V.A.; Bhatnagar, V.; Boehnlein, A.; Bolton, T.A.; Briskin, G.; Brooijmans, G.; Bross, A.; Buehler, M.; Burtovoi, V.S.; Canelli, F.; Casey, D.; Chakraborty, D.; Chopra, S.; Coney, L.; Connolly, B.; Coppage, D.; Cutts, D.; Davis, G.A.; de Jong, S.J.; Denisov, D.; Duflot, L.; Eltzroth, J.T.; Eno, S.; Eppley, G.; Evans, H.; Evdokimov, V.N.; Fein, D.; Fisk, H.E.; Galyaev, A.N.; Gavrilov, V.; Genik, R.J.; Genser, K.; Gómez, B.; Goncharov, P.I.; Gordon, H.; Gounder, K.; Grinstein, S.; Groer, L.; Gurzhiev, S.N.; Gutierrez, G.; Haggerty, H.; Hansen, S.; Hebert, C.; Heinson, A.P.; Hirosky, R.; Hobbs, J.D.; Jaffré, M.; Jesik, R.; Johnson, M.; Jonckheere, A.; Jöstlein, H.; Kajfasz, E.; Karmanov, D.; Kharchilava, A.; Krane, J.; Krishnaswamy, M.R.; Kulik, Y.; Kunori, S.; Luo, C.; Malyshev, V.L.; Merritt, K.W.; Miao, C.; Neal, H.A.; Papageorgiou, K.; Piegaia, R.; Pope, B.G.; Prosper, H.B.; Qian, J.; Rajagopalan, S.; Reucroft, S.; Rubinov, P.; Shivpuri, R.K.; Simak, V.; Soustruznik, K.; Souza, M.; Strovink, M.; Stutte, L.; Turcot, A.S.; Tuts, P.M.; Varelas, N.; Wahl, H.D.; Watts, G.; Willis, S.; Womersley, J.; Xu, Q.; Yamada, R.; Yu, J.; Zanabria, M.; Zheng, H.; Zhou, B.; Zutshi, V.

    Physics letters. B, 11/2003, Letnik: 574, Številka: 3-4
    Journal Article

    Using the DØ detector, we have observed events produced in p̄p 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±0.190.17%, and the probability that the non-diffractive background fluctuated to yield the observed diffractive signal is 3×10−14, corresponding to a significance of 7.5σ. The Z boson sample has a gap fraction of 1.44±0.610.52%, with a significance of 4.4σ. The diffractive events have very similar properties to the more common non-diffractive component.