Observation Of Diffractive B-Quark Production At The Fermilab, Tevatron

T. Affolder,H. Akimoto,A. Akopian,M. Albrow, P. Amaral,S. Amendolia, D. Amidei, J. Antos, G. Apollinari,T. Arisawa,T. Asakawa,W. Ashmanskas,M. Atac,P. Azzi-Bacchetta, N. Bacchetta,M. Bailey,S. Bailey,P. de Barbaro, A. Barbaro-Galtieri,V. Barnes, B. Barnett,M. Barone, G. Bauer,F. Bedeschi, S. Belforte, G. Bellettini, J. Bellinger,D. Benjamin,J. Bensinger, A. Beretvas,J. Berge, J. Berryhill,S. Bertolucci,B. Bevensee,A. Bhatti,C. Bigongiari,M. Binkley, D. Bisello,R. Blair,C. Blocker,K. Bloom, B. Blumenfeld,B. Blusk, A. Bocci,A. Bodek,W. Bokhari, G. Bolla,Y. Bonushkin,K. Borras,D. Bortoletto, J. Boudreau,A. Brandl,S. van den Brink,C. Bromberg,N. Bruner,E. Buckley-Geer, J. Budagov,H. Budd, K. Burkett,G. Busetto,A. Byon-Wagner,K. Byrum, M. Campbell,A. Caner,W. Carithers,J. Carlson, D. Carlsmith,J. Cassada, A. Castro, D. Cauz,A. Cerri,P. Chang,J. Chapman, C. Chen,Y. Chen,M.-T. Cheng, M. Chertok,G. Chiarelli,I. Chirikov-Zorin,G. Chlachidze, F. Chlebana,L. Christofek,M. Chu, S. Cihangir, C. Ciobanu,A. Clark,M. Cobal,E. Cocca, A. Connolly, J. Conway,J. Cooper,M. Cordelli,J. Guimaraes da Costa,D. Costanzo,J. Cranshaw, D. Cronin-Hennessy,R. Cropp, R. Culbertson,D. Dagenhart,F. DeJongh,S. Dell'Agnello,M. Dell'Orso,R. Demina, L. Demortier, M. Deninno,P. Derwent,T. Devlin, J. Dittmann,S. Donati,J. Done,T. Dorigo,N. Eddy, K. Einsweiler,J. Elias,E. Engels, W. Erdmann, D. Errede, S. Errede,Q. Fan, R. Feild, C. Ferretti,I. Fiori,B. Flaugher,G. Foster, M. Franklin, J. Freeman,J. Friedman,Y. Fukui, S. Gadomski,S. Galeotti, M. Gallinaro,T. Gao,M. Garcia-Sciveres, A. Garfinkel,P. Gatti, C. Gay,S. Geer, D. Gerdes,P. Giannetti,V. Glagolev,M. Gold,J. Goldstein, A. Gordon,A. Goshaw, Y. Gotra, K. Goulianos, H. Grassmann,C. Green,L. Groer,C. Grosso-Pilcher,M. Guenther,G. Guillian,R. Guo, C. Haber,E. Hafen,S. Hahn,C. Hall,T. Handa,R. Handler,W. Hao,F. Happacher, K. Hara,A. Hardman,R. Harris,F. Hartmann, K. Hatakeyama, J. Hauser,J. Heinrich,A. Heiss, B. Hinrichsen,K. Hoffman, C. Holck, R. Hollebeek,L. Holloway, R. Hughes,J. Huston,J. Huth,H. Ikeda,M. Incagli, J. Incandela,G. Introzzi,J. Iwai,Y. Iwata, E. James,H. Jensen,M. Jones, U. Joshi,H. Kambara, T. Kamon,T. Kaneko,K. Karr,H. Kasha,Y. Kato,T. Keaffaber,K. Kelley,M. Kelly,R. Kennedy,R. Kephart,D. Khazins,T. Kikuchi,M. Kirk,B. Kim,H. Kim, S. Kim,Y. Kim, L. Kirsch,S. Klimenko,D. Knoblauch,P. Koehn,A. Köngeter,K. Kondo, J. Konigsberg,K. Kordas, A. Korytov,E. Kovacs, J. Kroll, M. Kruse, S. Kuhlmann,K. Kurino,T. Kuwabara,A. Laasanen,N. Lai,S. Lami,S. Lammel,J. Lamoureux,M. Lancaster, G. Latino, T. LeCompte, A. Lee,S. Leone, J. Lewis,M. Lindgren, T. Liss, J. Liu, Y. Liu,N. Lockyer,M. Loreti,D. Lucchesi,P. Lukens,S. Lusin, J. Lys,R. Madrak, K. Maeshima, P. Maksimovic, L. Malferrari,M. Mangano,M. Mariotti,G. Martignon, A. Martin,J. Matthews, P. Mazzanti,K. McFarland,P. McIntyre,E. McKigney,M. Menguzzato, A. Menzione,E. Meschi, C. Mesropian,C. Miao, T. Miao,R. Miller,J. Miller,H. Minato,S. Miscetti,M. Mishina,N. Moggi,E. Moore,R. Moore,Y. Morita, A. Mukherjee, T. Muller,A. Munar,P. Murat,S. Murgia,M. Musy, J. Nachtman, S. Nahn,H. Nakada, T. Nakaya, I. Nakano, C. Nelson,D. Neuberger, C. Newman-Holmes,C.-Y. Ngan,P. Nicolaidi,H. Niu, L. Nodulman,A. Nomerotski,S. Oh,T. Ohmoto, T. Ohsugi,R. Oishi,T. Okusawa, J. Olsen,C. Pagliarone, F. Palmonari, R. Paoletti,V. Papadimitriou,S. Pappas,A. Parri,D. Partos,J. Patrick, G. Pauletta,M. Paulini,A. Perazzo,L. Pescara,T. Phillips,G. Piacentino,K. Pitts,R. Plunkett,A. Pompos,L. Pondrom,G. Pope,F. Prokoshin,J. Proudfoot,F. Ptohos,G. Punzi,K. Ragan,D. Reher,A. Ribon,F. Rimondi, L. Ristori,W. Robertson,A. Robinson, T. Rodrigo, S. Rolli,L. Rosenson,R. Roser, R. Rossin, W. Sakumoto, D. Saltzberg, A. Sansoni,L. Santi,H. Sato, P. Savard,P. Schlabach,E. Schmidt,M. Schmidt, M. Schmitt,L. Scodellaro,A. Scott, A. Scribano,S. Segler, S. Seidel, Y. Seiya,A. Semenov,F. Semeria, T. Shah, M. Shapiro,P. Shepard,T. Shibayama, M. Shimojima, M. Shochet, J. Siegrist,G. Signorelli,A. Sill,P. Sinervo, P. Singh,A. Slaughter,K. Sliwa,C. Smith,F. Snider,A. Solodsky, J. Spalding, T. Speer,P. Sphicas, F. Spinella, M. Spiropulu,L. Spiegel,L. Stanco, J. Steele,A. Stefanini, J. Strologas,F. Strumia, D. Stuart, K. Sumorok,T. Suzuki, R. Takashima,K. Takikawa,M. Tanaka,T. Takano, B. Tannenbaum,W. Taylor,M. Tecchio,P. Teng,K. Terashi,S. Tether,D. Theriot,R. Thurman-Keup,P. Tipton, S. Tkaczyk,K. Tollefson,A. Tollestrup,H. Toyoda, W. Trischuk,J. de Troconiz,S. Truitt,J. Tseng,N. Turini, F. Ukegawa,J. Valls,S. Vejcik,G. Velev,R. Vidal,R. Vilar,I. Vologouev,D. Vucinic,R. Wagner,J. Wahl,N. Wallace,A. Walsh, C. Wang,M. Wang,T. Watanabe,T. Watts,R. Webb,H. Wenzel,W. Wester,A. Wicklund, E. Wicklund,H. Williams,P. Wilson,B. Winer, D. Winn,S. Wolbers,D. Wolinski,J. Wolinski,S. Worm,X. Wu,J. Wyss,A. Yagil, W. Yao,G. Yeh,P. Yeh, J. Yoh,C. Yosef,T. Yoshida, I. Yu,S. Yu,A. Zanetti,F. Zetti,S. Zucchelli

PHYSICAL REVIEW LETTERS（2000）

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摘要

We report a measurement of the fraction of b quarks produced diffractively in (p) over bar p collisions at root s = 1.8 TeV. Diffraction is identified by the absence of particles in a forward pseudorapidity region. From events with an electron of transverse momentum 9.5 < p(T)(e) < 20 GeV/c within the pseudorapidity region \eta\ < 1.1, the ratio of diffractive to total b-quark production rates is found to be R-(b) over bar b = [0.62 +/- 0.19(stat) +/- 0.16(syst)]%. This result is comparable in magnitude to corresponding ratios for W and dijet production but significantly lower than expectations based on factorization.

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