Phys. Rev. D
69,
072004
(2004)
[21 pages]
Heavy flavor properties of jets produced in pp̅ interactions at √s=1.8TeV
D. Acosta et al. (CDF Collaboration)
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D. Acosta11, D. Ambrose31, K. Anikeev23, J. Antos1, G. Apollinari10, T. Arisawa41, A. Artikov8, F. Azfar29, P. Azzi-Bacchetta30, N. Bacchetta30, V. E. Barnes33, B. A. Barnett18, M. Barone12, G. Bauer23, F. Bedeschi32, S. Behari18, S. Belforte38, W. H. Bell14, G. Bellettini32, J. Bellinger42, A. Beretvas10, A. Bhatti35, D. Bisello30, C. Blocker3, B. Blumenfeld18, A. Bocci35, G. Bolla33, A. Bolshov23, D. Bortoletto33, J. Budagov8, H. S. Budd34, K. Burkett10, G. Busetto30, S. Cabrera9, W. Carithers21, D. Carlsmith42, R. Carosi32, A. Castro2, D. Cauz38, A. Cerri21, C. Chen31, Y. C. Chen1, G. Chiarelli32, G. Chlachidze8, M. L. Chu1, W.-H. Chung42, Y. S. Chung34, A. G. Clark13, M. Coca34, M. Convery35, M. Cordelli12, J. Cranshaw37, D. Dagenhart3, S. D’Auria14, S. Dell’Agnello12, P. de Barbaro34, S. De Cecco36, M. Dell’Orso32, L. Demortier35, M. Deninno2, D. De Pedis36, C. Dionisi36, S. Donati32, M. D’Onofrio13, T. Dorigo30, R. Eusebi34, S. Farrington14, J. P. Fernandez33, R. D. Field11, I. Fiori32, A. Foland15, L. R. Flores-Castillo33, M. Franklin15, J. Friedman23, I. Furic23, M. Gallinaro35, A. F. Garfinkel33, E. Gerstein7, S. Giagu32, P. Giannetti32, K. Giolo33, M. Giordani38, P. Giromini12, V. Glagolev8, G. Gomez6, I. Gorelov26, A. T. Goshaw9, K. Goulianos35, A. Gresele2, M. Guenther33, J. Guimaraes da Costa15, E. Halkiadakis34, C. Hall15, R. Handler42, F. Happacher12, K. Hara39, F. Hartmann19, K. Hatakeyama35, J. Hauser5, J. Heinrich31, M. Hennecke19, M. Herndon18, A. Hocker34, S. Hou1, B. T. Huffman29, G. Introzzi32, M. Iori36, A. Ivanov34, Y. Iwata16, B. Iyutin23, M. Jones33, M. Karagoz Unel27, K. Karr40, Y. Kato28, B. Kilminster34, D. H. Kim20, M. J. Kim7, S. B. Kim20, S. H. Kim39, T. H. Kim23, M. Kirby9, L. Kirsch3, S. Klimenko11, K. Kondo41, J. Konigsberg11, A. Korn23, A. Korytov11, K. Kotelnikov25, J. Kroll31, M. Kruse9, A. T. Laasanen33, S. Lami35, S. Lammel10, J. Lancaster9, G. Latino26, Y. Le18, J. Lee34, N. Leonardo23, S. Leone32, M. Lindgren5, N. S. Lockyer31, A. Loginov25, M. Loreti30, D. Lucchesi30, S. Lusin42, L. Lyons29, R. Madrak15, P. Maksimovic18, L. Malferrari2, M. Mariotti30, M. Martin18, V. Martin27, M. Martínez10, P. Mazzanti2, M. Menguzzato30, A. Menzione32, C. Mesropian35, A. Meyer10, S. Miscetti12, G. Mitselmakher11, Y. Miyazaki28, N. Moggi2, M. Mulhearn23, T. Muller19, A. Munar31, P. Murat10, I. Nakano16, R. Napora18, S. H. Oh9, Y. D. Oh20, T. Ohsugi16, T. Okusawa28, C. Pagliarone32, F. Palmonari32, R. Paoletti32, V. Papadimitriou37, A. Parri12, G. Pauletta38, T. Pauly29, C. Paus23, A. Penzo38, T. J. Phillips9, G. Piacentino32, J. Piedra6, K. T. Pitts17, A. Pompoš33, L. Pondrom42, T. Pratt29, F. Prokoshin8, F. Ptohos12, O. Poukhov8, G. Punzi32, J. Rademacker29, A. Rakitine23, H. Ray24, A. Reichold29, P. Renton29, M. Rescigno36, F. Rimondi2, L. Ristori32, W. J. Robertson9, T. Rodrigo6, S. Rolli40, L. Rosenson23, R. Rossin30, C. Rott33, A. Roy33, A. Ruiz6, D. Ryan40, A. Safonov4, W. K. Sakumoto34, D. Saltzberg5, L. Santi38, S. Sarkar36, A. Savoy-Navarro10, P. Schlabach10, M. Schmitt27, L. Scodellaro30, A. Scribano32, A. Sedov33, S. Seidel26, Y. Seiya39, A. Semenov8, F. Semeria2, T. Shibayama39, M. Shimojima39, A. Sidoti32, A. Sill37, K. Sliwa40, R. Snihur22, M. Spezziga37, F. Spinella32, M. Spiropulu15, R. St. Denis14, A. Stefanini32, A. Sukhanov11, K. Sumorok26, T. Suzuki39, R. Takashima16, K. Takikawa39, P. K. Teng1, K. Terashi35, S. Tether26, A. S. Thompson14, D. Tonelli32, J. Tseng26, D. Tsybychev11, N. Turini32, F. Ukegawa39, T. Unverhau14, E. Vataga32, G. Velev10, I. Vila6, R. Vilar6, M. von der Mey5, W. Wagner19, C. Wang9, M. J. Wang1, S. M. Wang11, B. Ward14, S. Waschke14, B. Whitehouse40, H. H. Williams31, M. Wolter40, X. Wu13, K. Yi18, T. Yoshida28, I. Yu20, S. Yu31, L. Zanello36, A. Zanetti38, and S. Zucchelli2 (CDF Collaboration)
1Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China
2Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40127 Bologna, Italy
3Brandeis University, Waltham, Massachusetts 02254, USA
4University of California at Davis, Davis, California 95616, USA
5University of California at Los Angeles, Los Angeles, California 90024, USA
6Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander, Spain
7Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
8Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
9Duke University, Durham, North Carolina 27708, USA
10Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
11University of Florida, Gainesville, Florida 32611, USA
12Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
13University of Geneva, CH-1211 Geneva 4, Switzerland
14Glasgow University, Glasgow G12 8QQ, United Kingdom
15Harvard University, Cambridge, Massachusetts 02138, USA
16Hiroshima University, Higashi-Hiroshima 724, Japan
17University of Illinois, Urbana, Illinois 61801, USA
18The Johns Hopkins University, Baltimore, Maryland 21218, USA
19Institut für Experimentelle Kernphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany
20Center for High Energy Physics: Kyungpook National University, Taegu 702-701; Seoul National University, Seoul 151-742 and SungKyunKwan University, Suwon 440-746; Korea
21Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
22University College London, London WC1E 6BT, United Kingdom
23Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
24University of Michigan, Ann Arbor, Michigan 48109, USA
25Institution for Theoretical and Experimental Physics, ITEP, Moscow 117259, Russia
26University of New Mexico, Albuquerque, New Mexico 87131, USA
27Northwestern University, Evanston, Illinois 60208, USA
28Osaka City University, Osaka 588, Japan
29University of Oxford, Oxford OX1 3RH, United Kingdom
30Universita di Padova, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
31University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
32Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, Italy
33Purdue University, West Lafayette, Indiana 47907, USA
34University of Rochester, Rochester, New York 14627, USA
35Rockefeller University, New York, New York 10021, USA
36Istituto Nazionale de Fisica Nucleare, Sezione di Roma, University di Roma I, “La Sapienza,” I-00185 Roma, Italy
37Texas Tech University, Lubbock, Texas 79409, USA
38Istituto Nazionale di Fisica Nucleare, University of Trieste/Udine, Italy
39University of Tsukuba, Tsukuba, Ibaraki 305, Japan
40Tufts University, Medford, Massachusetts 02155, USA
41Waseda University, Tokyo 169, Japan
42University of Wisconsin, Madison, Wisconsin 53706, USA
Received 2 December 2003; published 30 April 2004
We present a detailed examination of the heavy flavor properties of jets produced at the Fermilab Tevatron collider. The data set, collected with the Collider Detector at Fermilab, consists of events with two or more jets with transverse energy ET>~15GeV and pseudorapidity |η|<~1.5. The heavy flavor content of the data set is enriched by requiring that at least one of the jets (lepton-jet) contains a lepton with a transverse momentum larger than 8GeV/c. Jets containing hadrons with heavy flavor are selected via the identification of secondary vertices. The parton-level cross sections predicted by the HERWIG Monte Carlo generator program are tuned within theoretical and experimental uncertainties to reproduce the secondary-vertex rates in the data. The tuned simulation provides new information on the origin of the discrepancy between the bb̅ cross section measurements at the Tevatron and the next-to-leading order QCD prediction. We also compare the rate of away-jets (jets recoiling against the lepton-jet) containing a soft lepton (pT>~2GeV/c) in the data to that in the tuned simulation. We find that this rate is larger than what is expected for the conventional production and semileptonic decay of pairs of hadrons with heavy flavor.
© 2004 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.69.072004
DOI:
10.1103/PhysRevD.69.072004
PACS:
13.85.Qk, 13.20.Fc, 13.20.He
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