Phys. Rev. D
79,
072001
(2009)
[23 pages]
Top quark mass measurement in the lepton plus jets channel using a modified matrix element method
T. Aaltonen et al. CDF Collaboration
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T. Aaltonen24, J. Adelman14, T. Akimoto56, B. Álvarez González12,k, S. Amerio44a,44b, D. Amidei35, A. Anastassov39, A. Annovi20, J. Antos15, G. Apollinari18, A. Apresyan49, T. Arisawa58, A. Artikov16, W. Ashmanskas18, A. Attal4, A. Aurisano54, F. Azfar43, P. Azzurri47a,47d, W. Badgett18, A. Barbaro-Galtieri29, V. E. Barnes49, B. A. Barnett26, V. Bartsch31, G. Bauer33, P.-H. Beauchemin34, F. Bedeschi47a, D. Beecher31, S. Behari26, G. Bellettini47a,47b, J. Bellinger60, D. Benjamin17, A. Beretvas18, J. Beringer29, A. Bhatti51, M. Binkley18, D. Bisello44a,44b, I. Bizjak31,p, R. E. Blair2, C. Blocker7, B. Blumenfeld26, A. Bocci17, A. Bodek50, V. Boisvert50, G. Bolla49, D. Bortoletto49, J. Boudreau48, A. Boveia11, B. Brau11,†, A. Bridgeman25, L. Brigliadori44a, C. Bromberg36, E. Brubaker14, J. Budagov16, H. S. Budd50, S. Budd25, S. Burke18, K. Burkett18, G. Busetto44a,44b, P. Bussey22, A. Buzatu34, K. L. Byrum2, S. Cabrera17,m, C. Calancha32, M. Campanelli36, M. Campbell35, F. Canelli14,18, A. Canepa46, B. Carls25, D. Carlsmith60, R. Carosi47a, S. Carrillo19,f, S. Carron34, B. Casal12, M. Casarsa18, A. Castro6a,6b, P. Catastini47a,47c, D. Cauz55a,55b, V. Cavaliere47a,47c, M. Cavalli-Sforza4, A. Cerri29, L. Cerrito31,g, S. H. Chang28, Y. C. Chen1, M. Chertok8, G. Chiarelli47a, G. Chlachidze18, F. Chlebana18, K. Cho28, D. Chokheli16, J. P. Chou23, G. Choudalakis33, S. H. Chuang53, K. Chung13, W. H. Chung60, Y. S. Chung50, T. Chwalek27, C. I. Ciobanu45, M. A. Ciocci47a,47c, A. Clark21, D. Clark7, G. Compostella44a, M. E. Convery18, J. Conway8, M. Cordelli20, G. Cortiana44a,44b, C. A. Cox8, D. J. Cox8, F. Crescioli47a,47b, C. Cuenca Almenar8,m, J. Cuevas12,k, R. Culbertson18, J. C. Cully35, D. Dagenhart18, M. Datta18, T. Davies22, P. de Barbaro50, S. De Cecco52a, A. Deisher29, G. De Lorenzo4, M. Dell’Orso47a,47b, C. Deluca4, L. Demortier51, J. Deng17, M. Deninno6a, P. F. Derwent18, G. P. di Giovanni45, C. Dionisi52a,52b, B. Di Ruzza55a,55b, J. R. Dittmann5, M. D’Onofrio4, S. Donati47a,47b, P. Dong9, J. Donini44a, T. Dorigo44a, S. Dube53, J. Efron40, A. Elagin54, R. Erbacher8, D. Errede25, S. Errede25, R. Eusebi18, H. C. Fang29, S. Farrington43, W. T. Fedorko14, R. G. Feild61, M. Feindt27, J. P. Fernandez32, C. Ferrazza47a,47d, R. Field19, G. Flanagan49, R. Forrest8, M. J. Frank5, M. Franklin23, J. C. Freeman18, I. Furic19, M. Gallinaro52a, J. Galyardt13, F. Garberson11, J. E. Garcia21, A. F. Garfinkel49, K. Genser18, H. Gerberich25, D. Gerdes35, A. Gessler27, S. Giagu52a,52b, V. Giakoumopoulou3, P. Giannetti47a, K. Gibson48, J. L. Gimmell50, C. M. Ginsburg18, N. Giokaris3, M. Giordani55a,55b, P. Giromini20, M. Giunta47a,47b, G. Giurgiu26, V. Glagolev16, D. Glenzinski18, M. Gold38, N. Goldschmidt19, A. Golossanov18, G. Gomez12, G. Gomez-Ceballos33, M. Goncharov33, O. González32, I. Gorelov38, A. T. Goshaw17, K. Goulianos51, A. Gresele44a,44b, S. Grinstein23, C. Grosso-Pilcher14, R. C. Group18, U. Grundler25, J. Guimaraes da Costa23, Z. Gunay-Unalan36, C. Haber29, K. Hahn33, S. R. Hahn18, E. Halkiadakis53, B.-Y. Han50, J. Y. Han50, F. Happacher20, K. Hara56, D. Hare53, M. Hare57, S. Harper43, R. F. Harr59, R. M. Harris18, M. Hartz48, K. Hatakeyama51, C. Hays43, M. Heck27, A. Heijboer46, J. Heinrich46, C. Henderson33, M. Herndon60, J. Heuser27, S. Hewamanage5, D. Hidas17, C. S. Hill11,‡, D. Hirschbuehl27, A. Hocker18, S. Hou1, M. Houlden30, S.-C. Hsu29, B. T. Huffman43, R. E. Hughes40, U. Husemann61, M. Hussein36, J. Huston36, J. Incandela11, G. Introzzi47a, M. Iori52a,52b, A. Ivanov8, E. James18, D. Jang13, B. Jayatilaka17, E. J. Jeon28, M. K. Jha6a, S. Jindariani18, W. Johnson8, M. Jones49, K. K. Joo28, S. Y. Jun13, J. E. Jung28, T. R. Junk18, T. Kamon54, D. Kar19, P. E. Karchin59, Y. Kato42, R. Kephart18, J. Keung46, V. Khotilovich54, B. Kilminster18, D. H. Kim28, H. S. Kim28, H. W. Kim28, J. E. Kim28, M. J. Kim20, S. B. Kim28, S. H. Kim56, Y. K. Kim14, N. Kimura56, L. Kirsch7, S. Klimenko19, B. Knuteson33, B. R. Ko17, K. Kondo58, D. J. Kong28, J. Konigsberg19, A. Korytov19, A. V. Kotwal17, M. Kreps27, J. Kroll46, D. Krop14, N. Krumnack5, M. Kruse17, V. Krutelyov11, T. Kubo56, T. Kuhr27, N. P. Kulkarni59, M. Kurata56, S. Kwang14, A. T. Laasanen49, S. Lami47a, S. Lammel18, M. Lancaster31, R. L. Lander8, K. Lannon40,j, A. Lath53, G. Latino47a,47c, I. Lazzizzera44a,44b, T. LeCompte2, E. Lee54, H. S. Lee14, S. W. Lee54,l, S. Leone47a, J. D. Lewis18, C.-S. Lin29, J. Linacre43, M. Lindgren18, E. Lipeles46, A. Lister8, D. O. Litvintsev18, C. Liu48, T. Liu18, N. S. Lockyer46, A. Loginov61, M. Loreti44a,44b, L. Lovas15, D. Lucchesi44a,44b, C. Luci52a,52b, J. Lueck27, P. Lujan29, P. Lukens18, G. Lungu51, L. Lyons43, J. Lys29, R. Lysak15, D. MacQueen34, R. Madrak18, K. Maeshima18, K. Makhoul33, T. Maki24, P. Maksimovic26, S. Malde43, S. Malik31, G. Manca30,††, A. Manousakis-Katsikakis3, F. Margaroli49, C. Marino27, C. P. Marino25, A. Martin61, V. Martin22,e, M. Martínez4, R. Martínez-Ballarín32, T. Maruyama56, P. Mastrandrea52a, T. Masubuchi56, M. Mathis26, M. E. Mattson59, P. Mazzanti6a, K. S. McFarland50, P. McIntyre54, R. McNulty30,d, A. Mehta30, P. Mehtala24, A. Menzione47a, P. Merkel49, C. Mesropian51, T. Miao18, N. Miladinovic7, R. Miller36, C. Mills23, M. Milnik27, A. Mitra1, G. Mitselmakher19, H. Miyake56, N. Moggi6a, C. S. Moon28, R. Moore18, M. J. Morello47a,47b, J. Morlock27, P. Movilla Fernandez18, J. Mülmenstädt29, A. Mukherjee18, Th. Muller27, R. Mumford26, P. Murat18, M. Mussini6a,6b, J. Nachtman18, Y. Nagai56, A. Nagano56, J. Naganoma56, K. Nakamura56, I. Nakano41, A. Napier57, V. Necula17, J. Nett60, C. Neu46,n, M. S. Neubauer25, S. Neubauer27, J. Nielsen29,a, L. Nodulman2, M. Norman10, O. Norniella25, E. Nurse31, L. Oakes43, S. H. Oh17, Y. D. Oh28, I. Oksuzian19, T. Okusawa42, R. Orava24, K. Osterberg24, S. Pagan Griso44a,44b, E. Palencia18, V. Papadimitriou18, A. Papaikonomou27, A. A. Paramonov14, B. Parks40, S. Pashapour34, J. Patrick18, G. Pauletta55a,55b, M. Paulini13, C. Paus33, T. Peiffer27, D. E. Pellett8, A. Penzo55a, T. J. Phillips17, G. Piacentino47a, E. Pianori46, L. Pinera19, K. Pitts25, C. Plager9, L. Pondrom60, O. Poukhov16,*, N. Pounder43, F. Prakoshyn16, A. Pronko18, J. Proudfoot2, F. Ptohos18,c, E. Pueschel13, G. Punzi47a,47b, J. Pursley60, J. Rademacker43,§, A. Rahaman48, V. Ramakrishnan60, N. Ranjan49, I. Redondo32, P. Renton43, M. Renz27, M. Rescigno52a, S. Richter27, F. Rimondi6a,6b, L. Ristori47a, A. Robson22, T. Rodrigo12, T. Rodriguez46, E. Rogers25, S. Rolli57, R. Roser18, M. Rossi55a, R. Rossin11, P. Roy34, A. Ruiz12, J. Russ13, V. Rusu18, H. Saarikko24, A. Safonov54, W. K. Sakumoto50, O. Saltó4, L. Santi55a,55b, S. Sarkar52a,52b, L. Sartori47a, K. Sato18, A. Savoy-Navarro45, P. Schlabach18, A. Schmidt27, E. E. Schmidt18, M. A. Schmidt14, M. P. Schmidt61,*, M. Schmitt39, T. Schwarz8, L. Scodellaro12, A. Scribano47a,47c, F. Scuri47a, A. Sedov49, S. Seidel38, Y. Seiya42, A. Semenov16, L. Sexton-Kennedy18, F. Sforza47a, A. Sfyrla25, S. Z. Shalhout59, T. Shears30, P. F. Shepard48, M. Shimojima56,i, S. Shiraishi14, M. Shochet14, Y. Shon60, I. Shreyber37, A. Sidoti47a, J. Siegrist29, P. Sinervo34, A. Sisakyan16, A. J. Slaughter18, J. Slaunwhite40, K. Sliwa57, J. R. Smith8, F. D. Snider18, R. Snihur34, A. Soha8, S. Somalwar53, V. Sorin36, J. Spalding18, T. Spreitzer34, P. Squillacioti47a,47c, M. Stanitzki61, R. St. Denis22, B. Stelzer34, O. Stelzer-Chilton34, D. Stentz39, J. Strologas38, G. L. Strycker35, D. Stuart11, J. S. Suh28, A. Sukhanov19, I. Suslov16, T. Suzuki56, A. Taffard25,‡‡, R. Takashima41, Y. Takeuchi56, R. Tanaka41, M. Tecchio35, P. K. Teng1, K. Terashi51, J. Thom18,b, A. S. Thompson22, G. A. Thompson25, E. Thomson46, P. Tipton61, P. Ttito-Guzmán32, S. Tkaczyk18, D. Toback54, S. Tokar15, K. Tollefson36, T. Tomura56, D. Tonelli18, S. Torre20, D. Torretta18, P. Totaro55a,55b, S. Tourneur45, M. Trovato47a, S.-Y. Tsai1, Y. Tu46, N. Turini47a,47c, F. Ukegawa56, S. Vallecorsa21, N. van Remortel24,‡, A. Varganov35, E. Vataga47a,47d, F. Vázquez19,f, G. Velev18, C. Vellidis3, M. Vidal32, R. Vidal18, I. Vila12, R. Vilar12, T. Vine31, M. Vogel38, I. Volobouev29,l, G. Volpi47a,47b, P. Wagner46, R. G. Wagner2, R. L. Wagner18, W. Wagner27,o, J. Wagner-Kuhr27, T. Wakisaka42, R. Wallny9, S. M. Wang1, A. Warburton34, D. Waters31, M. Weinberger54, J. Weinelt27, W. C. Wester, III18, B. Whitehouse57, D. Whiteson46,‡‡, A. B. Wicklund2, E. Wicklund18, S. Wilbur14, G. Williams34, H. H. Williams46, P. Wilson18, B. L. Winer40, P. Wittich18,b, S. Wolbers18, C. Wolfe14, T. Wright35, X. Wu21, F. Würthwein10, S. Xie33, A. Yagil10, K. Yamamoto42, J. Yamaoka17, U. K. Yang14,h, Y. C. Yang28, W. M. Yao29, G. P. Yeh18, J. Yoh18, K. Yorita58, T. Yoshida42, G. B. Yu50, I. Yu28, S. S. Yu18, J. C. Yun18, L. Zanello52a,52b, A. Zanetti55a, X. Zhang25, Y. Zheng9,**, and S. Zucchelli6a,6b (CDF Collaboration)
1Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China
2Argonne National Laboratory, Argonne, Illinois 60439
3University of Athens, 157 71 Athens, Greece
4Institut de Fisica d’Altes Energies, Universitat Autonoma de Barcelona, E-08193, Bellaterra (Barcelona), Spain
5Baylor University, Waco, Texas 76798
6aIstituto Nazionale di Fisica Nucleare Bologna, I-40127 Bologna, Italy
6bUniversity of Bologna, I-40127 Bologna, Italy
7Brandeis University, Waltham, Massachusetts 02254
8University of California, Davis, Davis, California 95616
9University of California, Los Angeles, Los Angeles, California 90024
10University of California, San Diego, La Jolla, California 92093
11University of California, Santa Barbara, Santa Barbara, California 93106
12Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander, Spain
13Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
14Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637
15Comenius University, 842 48 Bratislava, Slovakia; Institute of Experimental Physics, 040 01 Kosice, Slovakia
16Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
17Duke University, Durham, North Carolina 27708
18Fermi National Accelerator Laboratory, Batavia, Illinois 60510
19University of Florida, Gainesville, Florida 32611
20Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
21University of Geneva, CH-1211 Geneva 4, Switzerland
22Glasgow University, Glasgow G12 8QQ, United Kingdom
23Harvard University, Cambridge, Massachusetts 02138
24Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland
25University of Illinois, Urbana, Illinois 61801
26The Johns Hopkins University, Baltimore, Maryland 21218
27Institut für Experimentelle Kernphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany
28Center for High Energy Physics: Kyungpook National University, Daegu 702-701, Korea; Seoul National University, Seoul 151-742, Korea; Sungkyunkwan University, Suwon 440-746, Korea; Korea Institute of Science and Technology Information, Daejeon, 305-806, Korea; Chonnam National University, Gwangju, 500-757, Korea
29Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
30University of Liverpool, Liverpool L69 7ZE, United Kingdom
31University College London, London WC1E 6BT, United Kingdom
32Centro de Investigaciones Energeticas Medioambientales y Tecnologicas, E-28040 Madrid, Spain
33Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
34Institute of Particle Physics: McGill University, Montréal, Québec, Canada H3A 2T8; Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6; University of Toronto, Toronto, Ontario, Canada M5S 1A7; and TRIUMF, Vancouver, British Columbia, Canada V6T 2A3
35University of Michigan, Ann Arbor, Michigan 48109
36Michigan State University, East Lansing, Michigan 48824
37Institution for Theoretical and Experimental Physics, ITEP, Moscow 117259, Russia
38University of New Mexico, Albuquerque, New Mexico 87131
39Northwestern University, Evanston, Illinois 60208
40The Ohio State University, Columbus, Ohio 43210
41Okayama University, Okayama 700-8530, Japan
42Osaka City University, Osaka 588, Japan
43University of Oxford, Oxford OX1 3RH, United Kingdom
44aIstituto Nazionale di Fisica Nucleare, Sezione di Padova-Trento, I-35131 Padova, Italy
44bUniversity of Padova, I-35131 Padova, Italy
45LPNHE, Universite Pierre et Marie Curie/IN2P3-CNRS, UMR7585, Paris, F-75252 France
46University of Pennsylvania, Philadelphia, Pennsylvania 19104
47aIstituto Nazionale di Fisica Nucleare Pisa, I-56127 Pisa, Italy
47bUniversity of Pisa, I-56127 Pisa, Italy
47cUniversity of Siena, I-56127 Pisa, Italy
47dScuola Normale Superiore, I-56127 Pisa, Italy
48University of Pittsburgh, Pittsburgh, Pennsylvania 15260
49Purdue University, West Lafayette, Indiana 47907
50University of Rochester, Rochester, New York 14627
51The Rockefeller University, New York, New York 10021
52aIstituto Nazionale di Fisica Nucleare, Sezione di Roma 1, Italy
52bSapienza Università di Roma, I-00185 Roma, Italy
53Rutgers University, Piscataway, New Jersey 08855
54Texas A&M University, College Station, Texas 77843
55aIstituto Nazionale di Fisica Nucleare Trieste/Udine, I-34100 Trieste, Italy
55bUniversity of Trieste/Udine, I-33100 Udine, Italy
56University of Tsukuba, Tsukuba, Ibaraki 305, Japan
57Tufts University, Medford, Massachusetts 02155
58Waseda University, Tokyo 169, Japan
59Wayne State University, Detroit, Michigan 48201
60University of Wisconsin, Madison, Wisconsin 53706
61Yale University, New Haven, Connecticut 06520
Received 24 December 2008; published 10 April 2009
We report a measurement of the top quark mass, mt, obtained from pp̅ collisions at √s=1.96 TeV at the Fermilab Tevatron using the CDF II detector. We analyze a sample corresponding to an integrated luminosity of 1.9 fb-1. We select events with an electron or muon, large missing transverse energy, and exactly four high-energy jets in the central region of the detector, at least one of which is tagged as coming from a b quark. We calculate a signal likelihood using a matrix element integration method, where the matrix element is modified by using effective propagators to take into account assumptions on event kinematics. Our event likelihood is a function of mt and a parameter JES (jet energy scale) that determines in situ the calibration of the jet energies. We use a neural network discriminant to distinguish signal from background events. We also apply a cut on the peak value of each event likelihood curve to reduce the contribution of background and badly reconstructed events. Using the 318 events that pass all selection criteria, we find mt=172.7±1.8(stat+JES)±1.2(syst) GeV/c2.
© 2009 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.79.072001
DOI:
10.1103/PhysRevD.79.072001
*Deceased. †With visitors from University of Massachusetts Amherst, Amherst, Massachusetts 01003. ‡With visitors from Universiteit Antwerpen, B-2610 Antwerp, Belgium. §With visitors from University of Bristol, Bristol BS8 1TL, United Kingdom. **With visitors from Chinese Academy of Sciences, Beijing 100864, China. ††With visitors from Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, 09042 Monserrato (Cagliari), Italy. ‡‡With visitors from University of California Irvine, Irvine, CA 92697. aWith visitors from University of California Santa Cruz, Santa Cruz, CA 95064. bWith visitors from Cornell University, Ithaca, NY 14853. cWith visitors from University of Cyprus, Nicosia CY-1678, Cyprus. dWith visitors from University College Dublin, Dublin 4, Ireland eWith visitors from University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom. fWith visitors from Universidad Iberoamericana, Mexico D.F., Mexico. gWith visitors from Queen Mary, University of London, London, E1 4NS, United Kingdom. hWith visitors from University of Manchester, Manchester M13 9PL, United Kingdom. iWith visitors from Nagasaki Institute of Applied Science, Nagasaki, Japan. jWith visitors from University of Notre Dame, Notre Dame, IN 46556. kWith visitors from University de Oviedo, E-33007 Oviedo, Spain. lWith visitors from Texas Tech University, Lubbock, TX 79409. mWith visitors from IFIC(CSIC-Universitat de Valencia), 46071 Valencia, Spain. nWith visitors from University of Virginia, Charlottesville, VA 22904. oWith visitors from Bergische Universität Wuppertal, 42097 Wuppertal, Germany. pOn leave from J. Stefan Institute, Ljubljana, Slovenia.
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