Observation of diffractive W-boson production at the fermilab tevatron
We report the first observation of diffractively produced W bosons.In a sample of W → eν events produced in pp collisions at √s=1.8TeV, we find an excess of events with a forward rapidity gap, which is attributed to diffraction.The probability that this excess is consistent with nondiffractive production is 1.1×10−4 (3.8σ).The relatively low fraction of W+ jet events observed within this excess implies that mainly quarks from the Pomeron, which mediates diffraction, participate in W production.The diffractive to nondiffractive W production ratio is found to be RW=(1.15±0.55)%.© 1997 The American Physical Society.
Abe, F; Akimoto, H; Akopian, A; Albrow, MG; Amendolia, SR; Amidei, D; Antos, J; Aota, S; Apollinari, G; Asakawa, T; Ashmanskas, W; Atac, M; Azfar, F; Azzi-Bacchetta, P; Bacchetta, N; Badgett, W; Bagdasarov, S; Bailey, MW; Bao, J; de Barbaro, P; Barbaro-Galtieri, A; Barnes, VE; Barnett, BA; Barone, M; Barzi, E; Bauer, G; Baumann, T; Bedeschi, F; Behrends, S; Belforte, S; Bellettini, G; Bellinger, J; Benjamin, D; Benlloch, J; Bensinger, J; Benton, D; Beretvas, A; Berge, JP; Berryhill, J; Bertolucci, S; Bevensee, B; Bhatti, A; Biery, K; Binkley, M; Bisello, D; Blair, RE; Blocker, C; Bodek, A; Bokhari, W; Bolognesi, V; Bolla, G; Bortoletto, D; Boudreau, J; Breccia, L; Bromberg, C; Bruner, N; Buckley-Geer, E; Budd, HS; Burkett, K; Busetto, G; Byon-Wagner, A; Byrum, KL; Cammerata, J; Campagnari, C; Campbell, M; Caner, A; Carithers, W; Carlsmith, D; Castro, A; Cauz, D; Cen, Y; Cervelli, F; Chang, PS; Chang, PT; Chao, HY; Chapman, J; Cheng, MT; Chiarelli, G; Chikamatsu, T; Chiou, CN; Christofek, L; Cihangir, S; Clark, AG; Cobal, M; Cocca, E; Contreras, M; Conway, J; Cooper, J; Cordelli, M; Couyoumtzelis, C; Crane, D; Cronin-Hennessy, D; Culbertson, R; Daniels, T; Dejongh, F; Delchamps, S; Dell’agnello, S; Dell’orso, M; Demina, R; Demortier, L
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