Measurement of the top quark mass in the lepton plus jets channel using the ideogram method

被引:19
作者
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
Aguilo, E.
Ahn, S. H.
Ahsan, M.
Alexeev, G. D.
Alkhazov, G.
Alton, A.
Alverson, G.
Alves, G. A.
Anastasoaie, M.
Ancu, L. S.
Andeen, T.
Anderson, S.
Andrieu, B.
Anzelc, M. S.
Arnoud, Y.
Arov, M.
Askew, A.
Asman, B.
Jesus, A. C. S. Assis
Atramentov, O.
Autermann, C.
Avila, C.
Ay, C.
Badaud, F.
Baden, A.
Bagby, L.
Baldin, B.
Bandurin, D. V.
Banerjee, P.
Banerjee, S.
Barberis, E.
Barfuss, A.-F.
Bargassa, P.
Baringer, P.
Barreto, J.
Bartlett, J. F.
Bassler, U.
Bauer, D.
Beale, S.
Bean, A.
Begalli, M.
Begel, M.
Belanger-Champagne, C.
Bellantoni, L.
机构
[1] LAFEX, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[2] Univ Fed Rio de Janeiro, BR-21941 Rio De Janeiro, Brazil
[3] Univ Estadual Paulista, Inst Fis Teor, Sao Paulo, Brazil
[4] Univ Alberta, Edmonton, AB T6G 2M7, Canada
[5] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada
[6] York Univ, Toronto, ON M3J 2R7, Canada
[7] McGill Univ, Montreal, PQ H3A 2T5, Canada
[8] Univ Sci & Technol China, Hefei 230026, Peoples R China
[9] Univ Los Andes, Bogota, Colombia
[10] Charles Univ Prague, Ctr Praticle Phys, CR-11636 Prague 1, Czech Republic
[11] Czech Tech Univ, Prague, Czech Republic
[12] Acad Sci Czech Republ, Inst Phys, Ctr Particle Phys, CR-10400 Prague, Czech Republic
[13] Univ San Francisco Quito, Quito, Ecuador
[14] Univ Clermont Ferrand, CNRS, IN2P3, Lab Phys Corpusclaire, Clermont Ferrand, France
[15] Univ Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, F-38041 Grenoble, France
[16] Univ Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, France
[17] Univ Paris 11, Orsay, France
[18] CNRS, IN2P3, Lab Accelerateur Lineaire, Orsay, France
[19] Univ Paris 06, CNRS, IN2P3, LPNHE, F-75005 Paris, France
[20] Univ Paris 07, CNRS, IN2P3, LPNHE, F-75221 Paris 05, France
[21] CEA Saclay, Serv Phys Particules, DAPNIA, Gif Sur Yvette, France
[22] Univ Strasbourg, CNRS, IN2P3, IPHC, F-67070 Strasbourg, France
[23] Univ Haute Alsace, Mulhouse, France
[24] Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France
[25] Rhein Westfal TH Aachen, Phys Inst A 3, D-5100 Aachen, Germany
[26] Univ Bonn, Inst Phys, D-5300 Bonn, Germany
[27] Univ Freiburg, Inst Phys, D-7800 Freiburg, Germany
[28] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany
[29] Univ Munich, D-8000 Munich, Germany
[30] Univ Bonn, Inst Phys, D-5300 Bonn, Germany
[31] Univ Freiburg, Inst Phys, D-7800 Freiburg, Germany
[32] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany
[33] Univ Munich, Munich, Germany
[34] Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany
[35] Panjab Univ, Chandigarh, India
[36] Univ Delhi, Delhi, India
[37] Tata inst Fundamental Res, Bombay, Maharashtra, India
[38] Univ Coll Dublin, Dublin 2, Ireland
[39] Korea Univ, Korea Detector Lab, Seoul, South Korea
[40] Sungkyunkwan Univ, Suwon, South Korea
[41] CINVESTAV, Mexico City, DF, Mexico
[42] NIKHEF, Fom Inst, Amsterdam, Netherlands
[43] Univ Amsterdam, NIKHEF, NL-1009 AT Amsterdam, Netherlands
[44] Radboud Univ Nijmegen, NIKHEF, Nijmegen, Netherlands
[45] Joint Inst Nucl Res, Dubna, Russia
[46] Inst Theoret & Expt Phys, Moscow, Russia
[47] Moscow MV Lomonosov State Univ, Moscow, Russia
[48] Inst High Energy Phys, Protvino, Russia
[49] Petersburg Nucl Phys Inst, St Petersburg, Russia
[50] Lund Univ, S-22100 Lund, Sweden
来源
PHYSICAL REVIEW D | 2007年 / 75卷 / 09期
基金
英国科学技术设施理事会;
关键词
D O I
10.1103/PhysRevD.75.092001
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A measurement of the top quark mass using events with one charged lepton, missing transverse energy, and jets in the final state, collected by the D0 detector from p (p) over bar collisions at root s=1.96 TeV at the Fermilab Tevatron collider, is presented. A constrained fit is used to fully reconstruct the kinematics of the events. For every event a top quark mass likelihood is calculated taking into account all possible jet assignments and the probability that an event is signal or background. Lifetime-based identification of b jets is employed to enhance the separation between t (t) over bar signal and background from other physics processes and to improve the assignment of the observed jets to the quarks in the t (1) over bar hypothesis. We extract a multiplicative jet energy scale (JES) factor in situ, greatly reducing the systematic effect related to the jet energy measurement. In a data sample with an integrated luminosity of 425 pb(-1), we observe 230 candidate events, with an estimated background of 123 events, and measure m(t)=173.7 +/- 4.4(stat+JES)(-2.0)(+2.1)(syst) GeV. This result represents the first application of the ideogram technique to the measurement of the top quark mass in lepton+jets events.
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页数:21
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