Top quark mass measurement in the lepton plus jets channel using a modified matrix element method

被引:15
作者
Aaltonen, T. [65 ,66 ]
Adelman, J. [14 ]
Akimoto, T. [57 ]
Alvarez Gonzalez, B. [12 ]
Amerio, S. [40 ,41 ]
Amidei, D. [33 ]
Anastassov, A. [36 ]
Annovi, A. [20 ]
Antos, J. [15 ,64 ]
Apollinari, G. [18 ]
Apresyan, A. [49 ]
Arisawa, T. [59 ]
Artikov, A. [16 ]
Ashmanskas, W. [18 ]
Attal, A. [3 ]
Aurisano, A. [4 ,77 ]
Azfar, F. [3 ,76 ]
Azzurri, P. [44 ,47 ]
Badgett, W. [18 ]
Barbaro-Galtieri, A. [28 ]
Barnes, V. E. [49 ]
Barnett, B. A. [25 ]
Bartsch, V. [2 ,71 ]
Bauer, G. [31 ]
Beauchemin, P. -H. [32 ,72 ,73 ,74 ]
Bedeschi, F. [44 ]
Beecher, D. [2 ,71 ]
Behari, S. [25 ]
Bellettini, G. [44 ,45 ]
Bellinger, J. [61 ]
Benjamin, D. [17 ]
Beretvas, A. [18 ]
Beringer, J. [28 ]
Bhatti, A. [51 ]
Binkley, M. [18 ]
Bisello, D. [41 ,44 ,45 ]
Bizjak, I. [2 ,71 ]
Blair, R. E. [1 ]
Blocker, C. [7 ]
Blumenfeld, B. [25 ]
Bocci, A. [17 ]
Bodek, A. [50 ]
Boisvert, V. [50 ]
Bolla, G. [49 ]
Bortoletto, D. [49 ]
Boudreau, J. [48 ]
Boveia, A. [11 ]
Brau, B. [11 ]
Bridgeman, A. [24 ]
Brigliadori, L. [40 ]
机构
[1] Argonne Natl Lab, Argonne, IL 60439 USA
[2] Univ Athens, GR-15771 Athens, Greece
[3] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain
[4] Baylor Univ, Waco, TX 76798 USA
[5] Ist Nazl Fis Nucl, I-40127 Bologna, Italy
[6] Univ Bologna, I-40127 Bologna, Italy
[7] Brandeis Univ, Waltham, MA 02254 USA
[8] Univ Calif Davis, Davis, CA 95616 USA
[9] Univ Calif Los Angeles, Los Angeles, CA 90024 USA
[10] Univ Calif San Diego, San Diego, CA 92093 USA
[11] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA
[12] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain
[13] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[14] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[15] Comenius Univ, Bratislava 84248, Slovakia
[16] Joint Inst Nucl Res, RU-141980 Dubna, Russia
[17] Duke Univ, Durham, NC 27708 USA
[18] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[19] Univ Florida, Gainesville, FL 32611 USA
[20] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[21] Univ Geneva, CH-1211 Geneva 4, Switzerland
[22] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland
[23] Harvard Univ, Cambridge, MA 02138 USA
[24] Univ Illinois, Urbana, IL 61801 USA
[25] Johns Hopkins Univ, Baltimore, MD 21218 USA
[26] Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany
[27] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea
[28] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[29] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England
[30] CIEMAT, E-28040 Madrid, Spain
[31] MIT, Cambridge, MA 02139 USA
[32] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada
[33] Univ Michigan, Ann Arbor, MI 48109 USA
[34] Inst Theoret & Expt Phys, Moscow 117259, Russia
[35] Univ New Mexico, Albuquerque, NM 87131 USA
[36] Northwestern Univ, Evanston, IL 60208 USA
[37] Ohio State Univ, Columbus, OH 43210 USA
[38] Okayama Univ, Okayama 7008530, Japan
[39] Osaka City Univ, Osaka 588, Japan
[40] Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy
[41] Univ Padua, I-35131 Padua, Italy
[42] Univ Paris 06, LPNHE, CNRS, IN2P3,UMR7585, F-75252 Paris, France
[43] Univ Penn, Philadelphia, PA 19104 USA
[44] Ist Nazl Fis Nucl, I-56127 Pisa, Italy
[45] Univ Pisa, I-56127 Pisa, Italy
[46] Univ Siena, I-56127 Pisa, Italy
[47] Scuola Normale Super Pisa, I-56127 Pisa, Italy
[48] Univ Pittsburgh, Pittsburgh, PA 15260 USA
[49] Purdue Univ, W Lafayette, IN 47907 USA
[50] Univ Rochester, Rochester, NY 14627 USA
来源
PHYSICAL REVIEW D | 2009年 / 79卷 / 07期
基金
美国国家科学基金会; 加拿大自然科学与工程研究理事会;
关键词
CDF; DETECTOR;
D O I
10.1103/PhysRevD.79.072001
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report a measurement of the top quark mass, m(t), obtained from p(p)over bar collisions at root 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 m(t) 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 m(t)=172.7 +/- 1.8(stat+JES)+/- 1.2(syst) GeV/c(2).
引用
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页数:23
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