Phys. Rev. D
66,
032002
(2002)
[8 pages]
Measurement of the ratio of b quark production cross sections in p̅ p collisions at √s=630 GeV and √s=1800 GeV
D. Acosta et al. (CDF Collaboration)
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D. Acosta13, T. Affolder24, H. Akimoto47, M. G. Albrow12, D. Ambrose34, D. Amidei26, K. Anikeev25, J. Antos1, G. Apollinari12, T. Arisawa47, A. Artikov10, T. Asakawa45, W. Ashmanskas9, F. Azfar32, P. Azzi-Bacchetta33, N. Bacchetta33, H. Bachacou24, W. Badgett12, S. Bailey17, P. de Barbaro38, A. Barbaro-Galtieri24, V. E. Barnes37, B. A. Barnett20, S. Baroiant5, M. Barone14, G. Bauer25, F. Bedeschi35, S. Belforte44, W. H. Bell16, G. Bellettini35, J. Bellinger48, D. Benjamin11, J. Bensinger4, A. Beretvas12, J. P. Berge12, J. Berryhill9, A. Bhatti39, M. Binkley12, D. Bisello33, M. Bishai12, R. E. Blair2, C. Blocker4, K. Bloom26, B. Blumenfeld20, S. R. Blusk38, A. Bocci39, A. Bodek38, G. Bolla37, Y. Bonushkin6, D. Bortoletto37, J. Boudreau36, A. Brandl28, S. van den Brink20, C. Bromberg27, M. Brozovic11, E. Brubaker24, N. Bruner28, E. Buckley-Geer12, J. Budagov10, H. S. Budd38, K. Burkett17, G. Busetto33, A. Byon-Wagner12, K. L. Byrum2, S. Cabrera11, P. Calafiura24, M. Campbell26, W. Carithers24, J. Carlson26, D. Carlsmith48, W. Caskey5, A. Castro3, D. Cauz44, A. Cerri35, A. W. Chan1, P. S. Chang1, P. T. Chang1, J. Chapman26, C. Chen34, Y. C. Chen1, M. -T. Cheng1, M. Chertok5, G. Chiarelli35, I. Chirikov-Zorin10, G. Chlachidze10, F. Chlebana12, L. Christofek19, M. L. Chu1, J. Y. Chung30, Y. S. Chung38, C. I. Ciobanu30, A. G. Clark15, A. P. Colijn12, A. Connolly24, M. Convery39, J. Conway40, M. Cordelli14, J. Cranshaw42, R. Culbertson12, D. Dagenhart46, S. D’Auria16, F. DeJongh12, S. Dell’Agnello14, M. Dell’Orso35, S. Demers38, L. Demortier39, M. Deninno3, P. F. Derwent12, T. Devlin40, J. R. Dittmann12, A. Dominguez24, S. Donati35, J. Done41, M. D’Onofrio35, T. Dorigo17, N. Eddy19, K. Einsweiler24, J. E. Elias12, E. Engels, Jr.36, R. Erbacher12, W. Erdmann12, D. Errede19, S. Errede19, Q. Fan38, S. Farrington16, H.-C. Fang24, R. G. Feild49, J. P. Fernandez12, C. Ferretti35, R. D. Field13, I. Fiori3, B. Flaugher12, G. W. Foster12, M. Franklin17, J. Freeman12, J. Friedman25, T. A. Fuess2, Y. Fukui23, I. Furic25, S. Galeotti35, A. Gallas29, M. Gallinaro39, T. Gao34, M. Garcia-Sciveres24, A. F. Garfinkel37, P. Gatti33, C. Gay49, D. W. Gerdes26, E. Gerstein8, P. Giannetti35, P. Giromini14, V. Glagolev10, D. Glenzinski12, M. Gold28, J. Goldstein12, I. Gorelov28, A. T. Goshaw11, Y. Gotra36, K. Goulianos39, C. Green37, G. Grim5, P. Gris12, C. Grosso-Pilcher9, M. Guenther37, G. Guillian26, J. Guimaraes da Costa17, R. M. Haas13, C. Haber24, S. R. Hahn12, C. Hall17, T. Handa18, R. Handler48, W. Hao42, F. Happacher14, K. Hara45, A. D. Hardman37, R. M. Harris12, F. Hartmann21, K. Hatakeyama39, J. Hauser6, J. Heinrich34, A. Heiss21, M. Hennecke21, M. Herndon20, C. Hill5, A. Hocker38, K. D. Hoffman9, R. Hollebeek34, L. Holloway19, B. T. Huffman32, R. Hughes30, J. Huston27, J. Huth17, H. Ikeda45, J. Incandela12,*, G. Introzzi35, A. Ivanov38, J. Iwai47, Y. Iwata18, E. James26, M. Jones34, U. Joshi12, H. Kambara15, T. Kamon41, T. Kaneko45, M. Karagoz Unel29, K. Karr46, S. Kartal12, H. Kasha49, Y. Kato31, T. A. Keaffaber37, K. Kelley25, M. Kelly26, R. D. Kennedy12, R. Kephart12, D. Khazins11, T. Kikuchi45, B. Kilminster38, B. J. Kim22, D. H. Kim22, H. S. Kim19, M. J. Kim8, S. B. Kim22, S. H. Kim45, Y. K. Kim24, M. Kirby11, M. Kirk4, L. Kirsch4, S. Klimenko13, P. Koehn30, K. Kondo47, J. Konigsberg13, A. Korn25, A. Korytov13, E. Kovacs2, J. Kroll34, M. Kruse11, S. Krutelyov41, S. E. Kuhlmann2, K. Kurino18, T. Kuwabara45, A. T. Laasanen37, N. Lai9, S. Lami39, S. Lammel12, J. Lancaster11, M. Lancaster24, R. Lander5, A. Lath40, G. Latino28, T. J. LeCompte2, K. Lee42, S. Leone35, J. D. Lewis12, M. Lindgren6, T. M. Liss19, J. B. Liu38, T. Liu12, Y. C. Liu1, D. O. Litvintsev12, O. Lobban42, N. S. Lockyer34, J. Loken32, M. Loreti33, D. Lucchesi33, P. Lukens12, S. Lusin48, L. Lyons32, J. Lys24, R. Madrak17, K. Maeshima12, P. Maksimovic17, L. Malferrari3, M. Mangano35, G. Manca32, M. Mariotti33, G. Martignon33, A. Martin49, V. Martin29, J. A. J. Matthews28, P. Mazzanti3, K. S. McFarland38, P. McIntyre41, M. Menguzzato33, A. Menzione35, P. Merkel12, C. Mesropian39, A. Meyer12, T. Miao12, R. Miller27, J. S. Miller26, H. Minato45, S. Miscetti14, M. Mishina23, G. Mitselmakher13, Y. Miyazaki31, N. Moggi3, E. Moore28, R. Moore26, Y. Morita23, T. Moulik37, M. Mulhearn25, A. Mukherjee12, T. Muller21, A. Munar35, P. Murat12, S. Murgia27, J. Nachtman6, V. Nagaslaev42, S. Nahn49, H. Nakada45, I. Nakano18, C. Nelson12, T. Nelson12, C. Neu30, D. Neuberger21, C. Newman-Holmes12, C.-Y. P. Ngan25, H. Niu4, L. Nodulman2, A. Nomerotski13, S. H. Oh11, Y. D. Oh22, K. Ohl49, T. Ohmoto18, T. Ohsugi18, R. Oishi45, T. Okusawa31, J. Olsen48, W. Orejudos24, C. Pagliarone35, F. Palmonari35, R. Paoletti35, V. Papadimitriou42, S. Pappas49, D. Partos4, J. Patrick12, G. Pauletta44, M. Paulini8, C. Paus25, D. Pellett5, L. Pescara33, T. J. Phillips11, G. Piacentino35, K. T. Pitts19, A. Pompos37, L. Pondrom48, G. Pope36, T. Pratt32, F. Prokoshin10, J. Proudfoot2, F. Ptohos14, O. Pukhov10, G. Punzi35, A. Rakitine25, F. Ratnikov40, D. Reher24, A. Reichold32, P. Renton32, A. Ribon33, W. Riegler17, F. Rimondi3, L. Ristori35, M. Riveline43, W. J. Robertson11, T. Rodrigo7, S. Rolli46, L. Rosenson25, R. Roser12, R. Rossin33, C. Rott37, A. Roy37, A. Ruiz7, A. Safonov5, R. St. Denis16, W. K. Sakumoto38, D. Saltzberg6, C. Sanchez30, A. Sansoni14, L. Santi44, H. Sato45, P. Savard43, A. Savoy-Navarro12, P. Schlabach12, E. E. Schmidt12, M. P. Schmidt49, M. Schmitt29, L. Scodellaro33, A. Scott6, A. Scribano35, A. Sedov37, S. Segler12, S. Seidel28, Y. Seiya45, A. Semenov10, F. Semeria3, T. Shah25, M. D. Shapiro24, P. F. Shepard36, T. Shibayama45, M. Shimojima45, M. Shochet9, A. Sidoti33, J. Siegrist24, A. Sill42, P. Sinervo43, P. Singh19, A. J. Slaughter49, K. Sliwa46, C. Smith20, F. D. Snider12, A. Solodsky39, J. Spalding12, T. Speer15, P. Sphicas25, F. Spinella35, M. Spiropulu9, L. Spiegel12, J. Steele48, A. Stefanini35, J. Strologas19, F. Strumia15, D. Stuart12, K. Sumorok25, T. Suzuki45, T. Takano31, R. Takashima18, K. Takikawa45, P. Tamburello11, M. Tanaka45, B. Tannenbaum6, M. Tecchio26, R. J. Tesarek12, P. K. Teng1, K. Terashi39, S. Tether25, A. S. Thompson16, E. Thomson30, R. Thurman-Keup2, P. Tipton38, S. Tkaczyk12, D. Toback41, K. Tollefson38, A. Tollestrup12, D. Tonelli35, M. Tonnesmann27, H. Toyoda31, W. Trischuk43, J. F. de Troconiz17, J. Tseng25, D. Tsybychev13, N. Turini35, F. Ukegawa45, T. Unverhau16, T. Vaiciulis38, J. Valls40, E. Vataga35, S. Vejcik, III12, G. Velev12, G. Veramendi24, R. Vidal12, I. Vila7, R. Vilar7, I. Volobouev24, M. von der Mey6, D. Vucinic25, R. G. Wagner2, R. L. Wagner12, N. B. Wallace40, Z. Wan40, C. Wang11, M. J. Wang1, S. M. Wang13, B. Ward16, S. Waschke16, T. Watanabe45, D. Waters32, T. Watts40, R. Webb41, M. Webber24, H. Wenzel21, W. C. Wester, III12, A. B. Wicklund2, E. Wicklund12, T. Wilkes5, H. H. Williams34, P. Wilson12, B. L. Winer30, D. Winn26, S. Wolbers12, D. Wolinski26, J. Wolinski27, S. Wolinski26, S. Worm40, X. Wu15, J. Wyss35, W. Yao24, G. P. Yeh12, P. Yeh1, J. Yoh12, C. Yosef27, T. Yoshida31, I. Yu22, S. Yu34, Z. Yu49, J. C. Yun12, A. Zanetti44, F. Zetti24, 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 Davis, Davis, California 95616
6University of California at Los Angeles, Los Angeles, California 90024
7Instituto de Fisica de Cantabria, CSIC–University of Cantabria, 39005 Santander, Spain
8Carnegie Mellon University, Pittsburgh, Pennsylvania 15218
9Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637
10Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
11Duke University, Durham, North Carolina 27708
12Fermi National Accelerator Laboratory, Batavia, Illinois 60510
13University of Florida, Gainesville, Florida 32611
14Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
15University of Geneva, CH-1211 Geneva 4, Switzerland
16Glasgow University, Glasgow G12 8QQ, United Kingdom
17Harvard University, Cambridge, Massachusetts 02138
18Hiroshima University, Higashi-Hiroshima 724, Japan
19University of Illinois, Urbana, Illinois 61801
20The Johns Hopkins University, Baltimore, Maryland 21218
21Institut für Experimentelle Kernphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany
22Center for High Energy Physics, Kyungpook National University, Taegu 702-701, Korea,Seoul National University, Seoul 151-742, Korea,SungKyunKwan University, Suwon 440-746, Korea
23High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305, Japan
24Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
25Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
26University of Michigan, Ann Arbor, Michigan 48109
27Michigan State University, East Lansing, Michigan 48824
28University of New Mexico, Albuquerque, New Mexico 87131
29Northwestern University, Evanston, Illinois 60208
30The Ohio State University, Columbus, Ohio 43210
31Osaka City University, Osaka 588, Japan
32University of Oxford, Oxford OX1 3RH, United Kingdom
33Universita di Padova, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
34University of Pennsylvania, Philadelphia, Pennsylvania 19104
35Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, Italy
36University of Pittsburgh, Pittsburgh, Pennsylvania 15260
37Purdue University, West Lafayette, Indiana 47907
38University of Rochester, Rochester, New York 14627
39Rockefeller University, New York, New York 10021
40Rutgers University, Piscataway, New Jersey 08855
41Texas A&M University, College Station, Texas 77843
42Texas Tech University, Lubbock, Texas 79409
43Institute of Particle Physics, University of Toronto, Toronto, Canada M5S 1A7
44Istituto Nazionale di Fisica Nucleare, University of Trieste/ Udine, Italy
45University of Tsukuba, Tsukuba, Ibaraki 305, Japan
46Tufts University, Medford, Massachusetts 02155
47Waseda University, Tokyo 169, Japan
48University of Wisconsin, Madison, Wisconsin 53706
49Yale University, New Haven, Connecticut 06520
Received 8 June 2002; published 13 August 2002
We report a measurement of the ratio of the bottom quark production cross section in antiproton-proton collisions at √s=630 GeV to 1800 GeV using bottom quarks with transverse momenta greater than 10.75 GeV identified through their semileptonic decays and long lifetimes. The measured ratio σ(630)/σ(1800)=0.171±.024±.012 is in good agreement with next-to-leading order quantum chromodynamics.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.66.032002
DOI:
10.1103/PhysRevD.66.032002
*Present address: University of California, Santa Barbara, CA 93106.
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