Phys. Rev. Lett.
84,
232–237
(2000)
Observation of Diffractive b-Quark Production at the Fermilab Tevatron
T. Affolder et al. (CDF Collaboration)
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T. Affolder21, H. Akimoto42, A. Akopian35, M. G. Albrow10, P. Amaral7, S. R. Amendolia31, D. Amidei24, J. Antos1, G. Apollinari35, T. Arisawa42, T. Asakawa40, W. Ashmanskas7, M. Atac10, P. Azzi-Bacchetta29, N. Bacchetta29, M. W. Bailey26, S. Bailey14, P. de Barbaro34, A. Barbaro-Galtieri21, V. E. Barnes33, B. A. Barnett17, M. Barone12, G. Bauer22, F. Bedeschi31, S. Belforte39, G. Bellettini31, J. Bellinger43, D. Benjamin9, J. Bensinger4, A. Beretvas10, J. P. Berge10, J. Berryhill7, S. Bertolucci12, B. Bevensee30, A. Bhatti35, C. Bigongiari31, M. Binkley10, D. Bisello29, R. E. Blair2, C. Blocker4, K. Bloom24, B. Blumenfeld17, B. S. Blusk34, A. Bocci31, A. Bodek34, W. Bokhari30, G. Bolla33, Y. Bonushkin5, K. Borras35, D. Bortoletto33, J. Boudreau32, A. Brandl26, S. van den Brink17, C. Bromberg25, N. Bruner26, E. Buckley-Geer10, J. Budagov8, H. S. Budd34, K. Burkett14, G. Busetto29, A. Byon-Wagner10, K. L. Byrum2, M. Campbell24, A. Caner31, W. Carithers21, J. Carlson24, D. Carlsmith43, J. Cassada34, A. Castro29, D. Cauz39, A. Cerri31, P. S. Chang1, P. T. Chang1, J. Chapman24, C. Chen30, Y. C. Chen1, M.-T. Cheng1, M. Chertok37, G. Chiarelli31, I. Chirikov-Zorin8, G. Chlachidze8, F. Chlebana10, L. Christofek16, M. L. Chu1, S. Cihangir10, C. I. Ciobanu27, A. G. Clark13, M. Cobal31, E. Cocca31, A. Connolly21, J. Conway36, J. Cooper10, M. Cordelli12, J. Guimaraes da Costa24, D. Costanzo31, J. Cranshaw38, D. Cronin-Hennessy9, R. Cropp23a,23b, R. Culbertson7, D. Dagenhart41, F. DeJongh10, S. Dell'Agnello12, M. Dell'Orso31, R. Demina10, L. Demortier35, M. Deninno3, P. F. Derwent10, T. Devlin36, J. R. Dittmann10, S. Donati31, J. Done37, T. Dorigo14, N. Eddy16, K. Einsweiler21, J. E. Elias10, E. Engels, Jr.32, W. Erdmann10, D. Errede16, S. Errede16, Q. Fan34, R. G. Feild44, C. Ferretti31, I. Fiori3, B. Flaugher10, G. W. Foster10, M. Franklin14, J. Freeman10, J. Friedman22, Y. Fukui20, S. Gadomski23a,23b, S. Galeotti31, M. Gallinaro35, T. Gao30, M. Garcia-Sciveres21, A. F. Garfinkel33, P. Gatti29, C. Gay44, S. Geer10, D. W. Gerdes24, P. Giannetti31, V. Glagolev8, M. Gold26, J. Goldstein10, A. Gordon14, A. T. Goshaw9, Y. Gotra32, K. Goulianos35, H. Grassmann39, C. Green33, L. Groer36, C. Grosso-Pilcher7, M. Guenther33, G. Guillian24, R. S. Guo1, C. Haber21, E. Hafen22, S. R. Hahn10, C. Hall14, T. Handa15, R. Handler43, W. Hao38, F. Happacher12, K. Hara40, A. D. Hardman33, R. M. Harris10, F. Hartmann18, K. Hatakeyama35, J. Hauser5, J. Heinrich30, A. Heiss18, B. Hinrichsen23a,23b, K. D. Hoffman33, C. Holck30, R. Hollebeek30, L. Holloway16, R. Hughes27, J. Huston25, J. Huth14, H. Ikeda40, M. Incagli31, J. Incandela10, G. Introzzi31, J. Iwai42, Y. Iwata15, E. James24, H. Jensen10, M. Jones30, U. Joshi10, H. Kambara13, T. Kamon37, T. Kaneko40, K. Karr41, H. Kasha44, Y. Kato28, T. A. Keaffaber33, K. Kelley22, M. Kelly24, R. D. Kennedy10, R. Kephart10, D. Khazins9, T. Kikuchi40, M. Kirk4, B. J. Kim19a,19b,19c, H. S. Kim23a,23b, S. H. Kim40, Y. K. Kim21, L. Kirsch4, S. Klimenko11, D. Knoblauch18, P. Koehn27, A. Köngeter18, K. Kondo42, J. Konigsberg11, K. Kordas23a,23b, A. Korytov11, E. Kovacs2, J. Kroll30, M. Kruse34, S. E. Kuhlmann2, K. Kurino15, T. Kuwabara40, A. T. Laasanen33, N. Lai7, S. Lami35, S. Lammel10, J. I. Lamoureux4, M. Lancaster21, G. Latino31, T. LeCompte2, A. M. Lee, IV9, S. Leone31, J. D. Lewis10, M. Lindgren5, T. M. Liss16, J. B. Liu34, Y. C. Liu1, N. Lockyer30, M. Loreti29, D. Lucchesi29, P. Lukens10, S. Lusin43, J. Lys21, R. Madrak14, K. Maeshima10, P. Maksimovic14, L. Malferrari3, M. Mangano31, M. Mariotti29, G. Martignon29, A. Martin44, J. A. J. Matthews26, P. Mazzanti3, K. S. McFarland34, P. McIntyre37, E. McKigney30, M. Menguzzato29, A. Menzione31, E. Meschi31, C. Mesropian35, C. Miao24, T. Miao10, R. Miller25, J. S. Miller24, H. Minato40, S. Miscetti12, M. Mishina20, N. Moggi31, E. Moore26, R. Moore24, Y. Morita20, A. Mukherjee10, T. Muller18, A. Munar31, P. Murat31, S. Murgia25, M. Musy39, J. Nachtman5, S. Nahn44, H. Nakada40, T. Nakaya7, I. Nakano15, C. Nelson10, D. Neuberger18, C. Newman-Holmes10, C.-Y. P. Ngan22, P. Nicolaidi39, H. Niu4, L. Nodulman2, A. Nomerotski11, S. H. Oh9, T. Ohmoto15, T. Ohsugi15, R. Oishi40, T. Okusawa28, J. Olsen43, C. Pagliarone31, F. Palmonari31, R. Paoletti31, V. Papadimitriou38, S. P. Pappas44, A. Parri12, D. Partos4, J. Patrick10, G. Pauletta39, M. Paulini21, A. Perazzo31, L. Pescara29, T. J. Phillips9, G. Piacentino31, K. T. Pitts10, R. Plunkett10, A. Pompos33, L. Pondrom43, G. Pope32, F. Prokoshin8, J. Proudfoot2, F. Ptohos12, G. Punzi31, K. Ragan23a,23b, D. Reher21, A. Ribon29, F. Rimondi3, L. Ristori31, W. J. Robertson9, A. Robinson23a,23b, T. Rodrigo6, S. Rolli41, L. Rosenson22, R. Roser10, R. Rossin29, W. K. Sakumoto34, D. Saltzberg5, A. Sansoni12, L. Santi39, H. Sato40, P. Savard23a,23b, P. Schlabach10, E. E. Schmidt10, M. P. Schmidt44, M. Schmitt14, L. Scodellaro29, A. Scott5, A. Scribano31, S. Segler10, S. Seidel26, Y. Seiya40, A. Semenov8, F. Semeria3, T. Shah22, M. D. Shapiro21, P. F. Shepard32, T. Shibayama40, M. Shimojima40, M. Shochet7, J. Siegrist21, G. Signorelli31, A. Sill38, P. Sinervo23a,23b, P. Singh16, A. J. Slaughter44, K. Sliwa41, C. Smith17, F. D. Snider10, A. Solodsky35, J. Spalding10, T. Speer13, P. Sphicas22, F. Spinella31, M. Spiropulu14, L. Spiegel10, L. Stanco29, J. Steele43, A. Stefanini31, J. Strologas16, F. Strumia13, D. Stuart10, K. Sumorok22, T. Suzuki40, R. Takashima15, K. Takikawa40, M. Tanaka40, T. Takano28, B. Tannenbaum5, W. Taylor23a,23b, M. Tecchio24, P. K. Teng1, K. Terashi40, S. Tether22, D. Theriot10, R. Thurman-Keup2, P. Tipton34, S. Tkaczyk10, K. Tollefson34, A. Tollestrup10, H. Toyoda28, W. Trischuk23a,23b, J. F. de Troconiz14, S. Truitt24, J. Tseng22, N. Turini31, F. Ukegawa40, J. Valls36, S. Vejcik, III10, G. Velev31, R. Vidal10, R. Vilar6, I. Vologouev21, D. Vucinic22, R. G. Wagner2, R. L. Wagner10, J. Wahl7, N. B. Wallace36, A. M. Walsh36, C. Wang9, C. H. Wang1, M. J. Wang1, T. Watanabe40, T. Watts36, R. Webb37, H. Wenzel18, W. C. Wester, III10, A. B. Wicklund2, E. Wicklund10, H. H. Williams30, P. Wilson10, B. L. Winer27, D. Winn24, S. Wolbers10, D. Wolinski24, J. Wolinski25, S. Worm26, X. Wu13, J. Wyss31, A. Yagil10, W. Yao21, G. P. Yeh10, P. Yeh1, J. Yoh10, C. Yosef25, T. Yoshida28, I. Yu19a,19b,19c, S. Yu30, A. Zanetti39, F. Zetti21, and S. Zucchelli3 (CDF Collaboration)
1Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China
2Argonne National Laboratory, Argonne, Illinois 60439
3Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40127 Bologna, Italy
4Brandeis University, Waltham, Massachusetts 02254
5University of California at Los Angeles, Los Angeles, California 90024
6Instituto de Fisica de Cantabria, University of Cantabria, 39005 Santander, Spain
7Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637
8Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
9Duke University, Durham, North Carolina 27708
10Fermi National Accelerator Laboratory, Batavia, Illinois 60510
11University of Florida, Gainesville, Florida 32611
12Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
13University of Geneva, CH-1211 Geneva 4, Switzerland
14Harvard University, Cambridge, Massachusetts 02138
15Hiroshima University, Higashi-Hiroshima 724, Japan
16University of Illinois, Urbana, Illinois 61801
17The Johns Hopkins University, Baltimore, Maryland 21218
18Institut für Experimentelle Kernphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany
19aKorean Hadron Collider Laboratory, Kyungpook National University, Taegu 702-701, Korea
19band Seoul National University, Seoul 151-742, Korea
19cand SungKyunKwan University, Suwon 440-746, Korea
20High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305, Japan
21Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
22Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
23aInstitute of Particle Physics, McGill University, Montreal H3A 2T8, Canada
23band University of Toronto, Toronto M5S 1A7, Canada
24University of Michigan, Ann Arbor, Michigan 48109
25Michigan State University, East Lansing, Michigan 48824
26University of New Mexico, Albuquerque, New Mexico 87131
27The Ohio State University, Columbus, Ohio 43210
28Osaka City University, Osaka 588, Japan
29Universita di Padova, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
30University of Pennsylvania, Philadelphia, Pennsylvania 19104
31Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, Italy
32University of Pittsburgh, Pittsburgh, Pennsylvania 15260
33Purdue University, West Lafayette, Indiana 47907
34University of Rochester, Rochester, New York 14627
35Rockefeller University, New York, New York 10021
36Rutgers University, Piscataway, New Jersey 08855
37Texas A&M University, College Station, Texas 77843
38Texas Tech University, Lubbock, Texas 79409
39Istituto Nazionale di Fisica Nucleare, University of Trieste, Udine, Italy
40University of Tsukuba, Tsukuba, Ibaraki 305, Japan
41Tufts University, Medford, Massachusetts 02155
42Waseda University, Tokyo 169, Japan
43University of Wisconsin, Madison, Wisconsin 53706
44Yale University, New Haven, Connecticut 06520
Received 6 August 1999; published in the issue dated 10 January 2000
We report a measurement of the fraction of b quarks produced diffractively in p̅ p collisions at √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<pTe<20 GeV/ c within the pseudorapidity region |η|<1.1, the ratio of diffractive to total b-quark production rates is found to be Rb̅ 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.
© 2000 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.232
DOI:
10.1103/PhysRevLett.84.232
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