Measurement of σ(p(p)over-bar → Z plus X)Br(Z → τ+τ-) at √s=1.96 TeV

被引:20
作者
Abazov, V. M. [1 ]
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
Aguilo, E.
Ahsan, M.
Alexeev, G. D.
Alkhazovn, G.
Alton, A.
Alverson, G.
Alves, G. A.
Anastasoaie, M.
Ancu, L. S.
Andeen, T.
Andrieu, B.
Anzelc, M. S.
Aoki, M.
Arnoud, Y.
Arov, M.
Arthaud, M.
Askew, A.
Asman, B.
Jesus, A. C. S. Assis
Atramentov, O.
Avila, C.
Badaud, F.
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.
Bellavance, A.
Benitez, J. A.
Beri, S. B.
机构
[1] Univ Buenos Aires, Buenos Aires, DF, Argentina
[2] Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil
[3] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil
[4] Univ Fed ABC, Santo Andre, Brazil
[5] Univ Estadual Paulista Sao Paulo, Inst Fis Teor, Sao Paulo, Brazil
[6] York Univ, Toronto, ON M3J 2R7, Canada
[7] Simon Fraser Univ, Burnaby, BC, Canada
[8] Univ Alberta, Edmonton, AB, Canada
[9] McGill Univ, Montreal, PQ, Canada
[10] Univ Sci & Technol China, Hefei 230026, Peoples R China
[11] Univ Los Andes, Bogota, Colombia
[12] Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic
[13] Czech Tech Univ, CR-16635 Prague, Czech Republic
[14] Acad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech Republic
[15] Univ San Francisco Quito, Quito, Ecuador
[16] Univ Blaise Pascal, CNRS, IN2P3, LPC, Clermont Ferrand, France
[17] Univ Grenoble 1, CNRS, IN2P3, Inst Natl Polytech Grenoble,LPC, F-38031 Grenoble, France
[18] Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France
[19] Univ Paris Sud, CNRS, IN2P3, LAL, Orsay, France
[20] Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France
[21] Univ Paris 07, Paris, France
[22] SPP, Irfu, CEA, Saclay, France
[23] Univ Strasbourg, IPHC, CNRS, IN2P3, Strasbourg, France
[24] Univ Lyon, Lyon, France
[25] Univ Lyon 1, CNRS, IPNL, F-69622 Villeurbanne, France
[26] Univ Aachen, Rhein Westfal TH Aachen, Phys Inst A 3, D-5100 Aachen, Germany
[27] Univ Bonn, Inst Phys, D-5300 Bonn, Germany
[28] Univ Freiburg, Inst Phys, Freiburg, Germany
[29] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany
[30] Univ Munich, Munich, Germany
[31] Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany
[32] Panjab Univ, Chandigarh 160014, India
[33] Univ Delhi, Delhi 110007, India
[34] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[35] Univ Coll Dublin, Dublin 2, Ireland
[36] Korea Univ, Korea Detector Lab, Seoul, South Korea
[37] Sungkyunkwan Univ, Suwon, South Korea
[38] CINVESTAV, Mexico City 14000, DF, Mexico
[39] FOM Inst NIKHEF, Amsterdam, Netherlands
[40] Univ Amsterdam, NIKHEF, Amsterdam, Netherlands
[41] Radboud Univ Nijmegen, NIKHEF, NL-6525 ED Nijmegen, Netherlands
[42] Joint Inst Nucl Res, Dubna, Russia
[43] Inst Theoret & Expt Phys, Moscow 117259, Russia
[44] Moscow MV Lomonosov State Univ, Moscow, Russia
[45] Inst High Energy Phys, Protvino, Russia
[46] Petersburg Nucl Phys Inst, St Petersburg, Russia
[47] Stockholm Univ, S-10691 Stockholm, Sweden
[48] Royal Inst Technol, Stockholm, Sweden
[49] Lund Univ, Lund, Sweden
[50] Uppsala Univ, Uppsala, Sweden
基金
瑞典研究理事会; 加拿大自然科学与工程研究理事会; 巴西圣保罗研究基金会;
关键词
D O I
10.1016/j.physletb.2008.11.010
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a measurement of the cross section for Z boson production times the branching fraction to tau lepton pairs sigma(p (p) over bar -> Z + X)Br(Z -> tau(+)tau(-)) in p (p) over bar collisions at root s = 1.96 TeV. The measurement is performed in the channel in which one tau lepton decays into a muon and neutrinos. and the other tau lepton decays hadronically or into an electron and neutrinos. The data sample corresponds to an integrated luminosity of 1.0 fb(-1) collected with the DO detector at the Fermilab Tevatron Collider. The sample contains 1511 candidate events with an estimated 20% background from jets or muons misidentified as tau leptons. We obtain sigma . Br = 240 +/- 8 (star) +/- 12 (sys) +/- 15 (lum) pb, which is consistent with the standard model prediction. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:292 / 299
页数:8
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