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Measurement of b-Quark Fragmentation Fractions in pp¯ Collisions at s=1.8TeV

T. Affolder23, H. Akimoto45, A. Akopian38, M. G. Albrow10, P. Amaral7, S. R. Amendolia34, D. Amidei27, J. Antos1, G. Apollinari38 et al. (CDF Collaboration)

G. Apollinari38, T. Arisawa45, T. Asakawa43, W. Ashmanskas7, M. Atac10, P. Azzi-Bacchetta32, N. Bacchetta32, M. W. Bailey29, S. Bailey14, P. de Barbaro37, A. Barbaro-Galtieri23, V. E. Barnes36, B. A. Barnett17, M. Barone12, G. Bauer24, F. Bedeschi34, S. Belforte42, G. Bellettini34, J. Bellinger46, D. Benjamin9, J. Bensinger4, A. Beretvas10, J. P. Berge10, J. Berryhill7, S. Bertolucci12, B. Bevensee33, A. Bhatti38, C. Bigongiari34, M. Binkley10, D. Bisello32, R. E. Blair2, C. Blocker4, K. Bloom27, B. Blumenfeld17, B. S. Blusk37, A. Bocci34, A. Bodek37, W. Bokhari33, G. Bolla36, Y. Bonushkin5, D. Bortoletto36, J. Boudreau35, A. Brandl29, S. van den Brink17, C. Bromberg28, N. Bruner29, E. Buckley-Geer10, J. Budagov8, H. S. Budd37, K. Burkett14, G. Busetto32, A. Byon-Wagner10, K. L. Byrum2, M. Campbell27, A. Caner34, W. Carithers23, J. Carlson27, D. Carlsmith46, J. Cassada37, A. Castro32, D. Cauz42, A. Cerri34, P. S. Chang1, P. T. Chang1, J. Chapman27, C. Chen33, Y. C. Chen1, M.-T. Cheng1, M. Chertok40, G. Chiarelli34, I. Chirikov-Zorin8, G. Chlachidze8, F. Chlebana10, L. Christofek16, M. L. Chu1, S. Cihangir10, C. I. Ciobanu30, A. G. Clark13, M. Cobal34, E. Cocca34, A. Connolly23, J. Conway39, J. Cooper10, M. Cordelli12, J. Guimaraes da Costa27, D. Costanzo34, J. Cranshaw41, D. Cronin-Hennessy9, R. Cropp25,26, R. Culbertson7, D. Dagenhart44, F. DeJongh10, S. Dell'Agnello12, M. Dell'Orso34, R. Demina10, L. Demortier38, M. Deninno3, P. F. Derwent10, T. Devlin39, J. R. Dittmann10, S. Donati34, J. Done40, T. Dorigo14, N. Eddy16, K. Einsweiler23, J. E. Elias10, E. Engels, Jr.35, W. Erdmann10, D. Errede16, S. Errede16, Q. Fan37, R. G. Feild47, C. Ferretti34, I. Fiori3, B. Flaugher10, G. W. Foster10, M. Franklin14, J. Freeman10, J. Friedman24, Y. Fukui22, S. Gadomski25,26, S. Galeotti34, M. Gallinaro38, T. Gao33, M. Garcia-Sciveres23, A. F. Garfinkel36, P. Gatti32, C. Gay47, S. Geer10, D. W. Gerdes27, P. Giannetti34, P. Giromini12, V. Glagolev8, M. Gold29, J. Goldstein10, A. Gordon14, A. T. Goshaw9, Y. Gotra35, K. Goulianos38, H. Grassmann42, C. Green36, L. Groer39, C. Grosso-Pilcher7, M. Guenther36, G. Guillian27, R. S. Guo1, C. Haber23, E. Hafen24, S. R. Hahn10, C. Hall14, T. Handa15, R. Handler46, W. Hao41, F. Happacher12, K. Hara43, A. D. Hardman36, R. M. Harris10, F. Hartmann18, K. Hatakeyama38, J. Hauser5, J. Heinrich33, A. Heiss18, B. Hinrichsen25,26, K. D. Hoffman36, C. Holck33, R. Hollebeek33, L. Holloway16, R. Hughes30, J. Huston28, J. Huth14, H. Ikeda43, M. Incagli34, J. Incandela10, G. Introzzi34, J. Iwai45, Y. Iwata15, E. James27, H. Jensen10, M. Jones33, U. Joshi10, H. Kambara13, T. Kamon40, T. Kaneko43, K. Karr44, H. Kasha47, Y. Kato31, T. A. Keaffaber36, K. Kelley24, M. Kelly27, R. D. Kennedy10, R. Kephart10, D. Khazins9, T. Kikuchi43, M. Kirk4, B. J. Kim19,20,21, H. S. Kim25,26, S. H. Kim43, Y. K. Kim23, L. Kirsch4, S. Klimenko11, D. Knoblauch18, P. Koehn30, A. Köngeter18, K. Kondo45, J. Konigsberg11, K. Kordas25,26, A. Korytov11, E. Kovacs2, J. Kroll33, M. Kruse37, S. E. Kuhlmann2, K. Kurino15, T. Kuwabara43, A. T. Laasanen36, N. Lai7, S. Lami38, S. Lammel10, J. I. Lamoureux4, M. Lancaster23, G. Latino34, T. LeCompte2, A. M. Lee, IV9, S. Leone34, J. D. Lewis10, M. Lindgren5, T. M. Liss16, J. B. Liu37, Y. C. Liu1, N. Lockyer33, M. Loreti32, D. Lucchesi32, P. Lukens10, S. Lusin46, J. Lys23, R. Madrak14, K. Maeshima10, P. Maksimovic14, L. Malferrari3, M. Mangano34, M. Mariotti32, G. Martignon32, A. Martin47, J. A. J. Matthews29, P. Mazzanti3, K. S. McFarland37, P. McIntyre40, E. McKigney33, M. Menguzzato32, A. Menzione34, E. Meschi34, C. Mesropian38, C. Miao27, T. Miao10, R. Miller28, J. S. Miller27, H. Minato43, S. Miscetti12, M. Mishina22, N. Moggi34, E. Moore29, R. Moore27, Y. Morita22, A. Mukherjee10, T. Muller18, A. Munar34, P. Murat34, S. Murgia28, M. Musy42, J. Nachtman5, S. Nahn47, H. Nakada43, T. Nakaya7, I. Nakano15, C. Nelson10, D. Neuberger18, C. Newman-Holmes10, C.-Y. P. Ngan24, P. Nicolaidi42, H. Niu4, L. Nodulman2, A. Nomerotski11, S. H. Oh9, T. Ohmoto15, T. Ohsugi15, R. Oishi43, T. Okusawa31, J. Olsen46, C. Pagliarone34, F. Palmonari34, R. Paoletti34, V. Papadimitriou41, S. P. Pappas47, A. Parri12, D. Partos4, J. Patrick10, G. Pauletta42, M. Paulini23, A. Perazzo34, L. Pescara32, T. J. Phillips9, G. Piacentino34, K. T. Pitts10, R. Plunkett10, A. Pompos36, L. Pondrom46, G. Pope35, F. Prokoshin8, J. Proudfoot2, F. Ptohos12, G. Punzi34, K. Ragan25,26, D. Reher23, W. Riegler14, A. Ribon32, F. Rimondi3, L. Ristori34, W. J. Robertson9, A. Robinson25,26, T. Rodrigo6, S. Rolli44, L. Rosenson24, R. Roser10, R. Rossin32, W. K. Sakumoto37, D. Saltzberg5, A. Sansoni12, L. Santi42, H. Sato43, P. Savard25,26, P. Schlabach10, E. E. Schmidt10, M. P. Schmidt47, M. Schmitt14, L. Scodellaro32, A. Scott5, A. Scribano34, S. Segler10, S. Seidel29, Y. Seiya43, A. Semenov8, F. Semeria3, T. Shah24, M. D. Shapiro23, P. F. Shepard35, T. Shibayama43, M. Shimojima43, M. Shochet7, J. Siegrist23, G. Signorelli34, A. Sill41, P. Sinervo25,26, P. Singh16, A. J. Slaughter47, K. Sliwa44, C. Smith17, F. D. Snider10, A. Solodsky38, J. Spalding10, T. Speer13, P. Sphicas24, F. Spinella34, M. Spiropulu14, L. Spiegel10, L. Stanco32, J. Steele46, A. Stefanini34, J. Strologas16, F. Strumia13, D. Stuart10, K. Sumorok24, T. Suzuki43, R. Takashima15, K. Takikawa43, M. Tanaka43, T. Takano31, B. Tannenbaum5, W. Taylor25,26, M. Tecchio27, P. K. Teng1, K. Terashi43, S. Tether24, D. Theriot10, R. Thurman-Keup2, P. Tipton37, S. Tkaczyk10, K. Tollefson37, A. Tollestrup10, H. Toyoda31, W. Trischuk25,26, J. F. de Troconiz14, S. Truitt27, J. Tseng24, N. Turini34, F. Ukegawa43, J. Valls39, S. Vejcik, III10, G. Velev34, R. Vidal10, R. Vilar6, I. Vologouev23, D. Vucinic24, R. G. Wagner2, R. L. Wagner10, J. Wahl7, N. B. Wallace39, A. M. Walsh39, C. Wang9, C. H. Wang1, M. J. Wang1, T. Watanabe43, T. Watts39, R. Webb40, H. Wenzel18, W. C. Wester, III10, A. B. Wicklund2, E. Wicklund10, H. H. Williams33, P. Wilson10, B. L. Winer30, D. Winn27, S. Wolbers10, D. Wolinski27, J. Wolinski28, S. Worm29, X. Wu13, J. Wyss34, A. Yagil10, W. Yao23, G. P. Yeh10, P. Yeh1, J. Yoh10, C. Yosef28, T. Yoshida31, I. Yu19,20,21, S. Yu33, A. Zanetti42, F. Zetti23, 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
  • 19Korean Hadron Collider Laboratory, Kyungpook National University, Taegu 702-701, Korea
  • 20and Seoul National University, Seoul 151-742, Korea
  • 21and SungKyunKwan University, Suwon 440-746, Korea
  • 22High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305, Japan
  • 23Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
  • 24Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
  • 25Institute of Particle Physics, McGill University, Montreal H3A 2T8, Canada
  • 26and University of Toronto, Toronto M5S 1A7, Canada
  • 27University of Michigan, Ann Arbor, Michigan 48109
  • 28Michigan State University, East Lansing, Michigan 48824
  • 29University of New Mexico, Albuquerque, New Mexico 87131
  • 30The Ohio State University, Columbus, Ohio 43210
  • 31Osaka City University, Osaka 588, Japan
  • 32Universita di Padova, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
  • 33University of Pennsylvania, Philadelphia, Pennsylvania 19104
  • 34Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, Italy
  • 35University of Pittsburgh, Pittsburgh, Pennsylvania 15260
  • 36Purdue University, West Lafayette, Indiana 47907
  • 37University of Rochester, Rochester, New York 14627
  • 38Rockefeller University, New York, New York 10021
  • 39Rutgers University, Piscataway, New Jersey 08855
  • 40Texas A&M University, College Station, Texas 77843
  • 41Texas Tech University, Lubbock, Texas 79409
  • 42Istituto Nazionale di Fisica Nucleare, University of Trieste/Udine, Udine, Italy
  • 43University of Tsukuba, Tsukuba, Ibaraki 305, Japan
  • 44Tufts University, Medford, Massachusetts 02155
  • 45Waseda University, Tokyo 169, Japan
  • 46University of Wisconsin, Madison, Wisconsin 53706
  • 47Yale University, New Haven, Connecticut 06520

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Phys. Rev. Lett. 84, 1663 – Published 21 February, 2000

DOI: https://doi.org/10.1103/PhysRevLett.84.1663

Abstract

We have studied the production of B hadrons in 1.8-TeV pp¯ collisions. We present measurements of the fragmentation fractions, fu, fd, fs, and fbaryon, of produced b quarks that yield B+, B0, Bs0, and Λ¯b0 hadrons. Reconstruction of five electron-charm final states yields fs/(fu+fd)=0.213±0.068 and fbaryon/(fu+fd)=0.118±0.042, assuming fu=fd. If all B hadrons produced in pp¯ collisions cascade to one of these four hadrons, we determine fu=fd=0.375±0.023, fs=0.160±0.044, and fbaryon=0.090±0.029. If we do not assume fu=fd, we find fd/fu=0.84±0.16.

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References (15)

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Phys. Rev. Lett. 84, 1663– Published 21 February, 2000
  • Received 21 September 1999

© 2000 American Physical Society

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