Measurement of the W boson helicity in top quark decays using 5.4 fb-1 of p(p)over-bar collision data

被引:41
作者
Abazov, V. M. [1 ]
Abbott, B. [77 ]
Acharya, B. S. [33 ]
Adams, M. [53 ]
Adams, T. [51 ]
Alexeev, G. D. [1 ]
Alkhazov, G. [43 ]
Alton, A. [65 ]
Alverson, G. [64 ]
Alves, G. A. [3 ]
Ancu, L. S. [39 ]
Aoki, M. [16 ]
Arnoud, Y. [62 ]
Arov, M. [51 ]
Askew, A. [51 ]
Asman, B. [44 ,45 ]
Atramentov, O. [69 ]
Avila, C. [10 ]
BackusMayes, J. [84 ]
Badaud, F. [15 ]
Bagby, L. [52 ]
Baldin, B. [52 ]
Bandurin, D. V. [51 ]
Banerjee, S. [33 ]
Barberis, E. [43 ]
Baringer, P. [58 ]
Barreto, J. [3 ]
Bartlett, J. F. [52 ]
Bassler, U. [21 ]
Bazterra, V. [53 ]
Beale, S. [7 ,8 ]
Bean, A. [60 ]
Begalli, M. [4 ]
Begel, M. [75 ]
Belanger-Champagne, C. [44 ,45 ]
Bellantoni, L. [52 ]
Beri, S. B. [31 ]
Bernardi, G. [19 ,20 ]
Bernhard, R. [26 ]
Bertram, I. [46 ]
Besancon, M. [21 ]
Beuselinck, R. [47 ]
Bezzubov, V. A. [42 ]
Bhat, P. C. [52 ]
Bhatnagar, V. [31 ]
Blazey, G. [54 ]
Blessing, S. [51 ]
Bloom, K. [68 ]
Boehnlein, A. [52 ]
Boline, D. [74 ]
机构
[1] Joint Inst Nucl Res, Dubna, Russia
[2] Univ Buenos Aires, Buenos Aires, DF, Argentina
[3] Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil
[4] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil
[5] Univ Fed ABC, Santo Andre, Brazil
[6] Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil
[7] Simon Fraser Univ, Vancouver, BC, Canada
[8] York Univ, Toronto, ON M3J 2R7, Canada
[9] Univ Sci & Technol China, Hefei 230026, Peoples R China
[10] Univ Los Andes, Bogota, Colombia
[11] Charles Univ Prague, Fac Math & Phys, Ctr Particle Phys, Prague, Czech Republic
[12] Czech Tech Univ, Prague, Czech Republic
[13] Acad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech Republic
[14] Univ San Francisco Quito, Quito, Ecuador
[15] Univ Blaise Pascal, CNRS IN2P3, LPC, Clermont, France
[16] Univ Grenoble 1, CNRS IN2P3, LPSC, Inst Natl Polytech Grenoble, Grenoble, France
[17] Aix Marseille Univ, CNRS IN2P3, CPPM, Marseille, France
[18] Univ Paris 11, CNRS IN2P3, LAL, Orsay, France
[19] Univ Paris 06, LPNHE, Paris, France
[20] Univ Paris 07, CNRS IN2P3, Paris, France
[21] CEA, Irfu, SPP, Saclay, France
[22] Univ Strasbourg, CNRS IN2P3, IPHC, Strasbourg, France
[23] Univ Lyon 1, CNRS IN2P3, IPNL, F-69622 Villeurbanne, France
[24] Univ Lyon, Lyon, France
[25] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[26] Univ Freiburg, Inst Phys, Freiburg, Germany
[27] Univ Gottingen, Inst Phys 2, Gottingen, Germany
[28] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany
[29] Univ Munich, Munich, Germany
[30] Berg Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany
[31] Panjab Univ, Chandigarh 160014, India
[32] Univ Delhi, Delhi 110007, India
[33] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[34] Univ Coll Dublin, Dublin 2, Ireland
[35] Korea Univ, Korea Detector Lab, Seoul, South Korea
[36] CINVESTAV, Mexico City 14000, DF, Mexico
[37] FOM Inst NIKHEF, Amsterdam, Netherlands
[38] Univ Amsterdam NIKHEF, Amsterdam, Netherlands
[39] Radboud Univ Nijmegen NIKHEF, Nijmegen, Netherlands
[40] Inst Theoret & Expt Phys, Moscow 117259, Russia
[41] Moscow MV Lomonosov State Univ, Moscow, Russia
[42] Inst High Energy Phys, Protvino, Russia
[43] Petersburg Nucl Phys Inst, St Petersburg, Russia
[44] Stockholm Univ, S-10691 Stockholm, Sweden
[45] Uppsala Univ, Uppsala, Sweden
[46] Univ Lancaster, Lancaster LA1 4YB, England
[47] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England
[48] Univ Manchester, Manchester M13 9PL, Lancs, England
[49] Univ Arizona, Tucson, AZ 85721 USA
[50] Univ Calif Riverside, Riverside, CA 92521 USA
来源
PHYSICAL REVIEW D | 2011年 / 83卷 / 03期
基金
瑞典研究理事会; 巴西圣保罗研究基金会; 加拿大自然科学与工程研究理事会;
关键词
(P)OVER-BAR-P COLLISIONS;
D O I
10.1103/PhysRevD.83.032009
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a measurement of the helicity of the W boson produced in top quark decays using t (t) over bar decays in the l + jets and dilepton final states selected from a sample of 5.4 fb(-1) of collisions recorded using the D0 detector at the Fermilab Tevatron p (p) over bar collider. We measure the fractions of longitudinal and right-handed W bosons to be f(0) = 0.669 +/- 0.102[+/- 0.078(stat.) +/- 0.065(syst.) +/- and f(+) = 0.023 +/- 0.053[+/- 0.041(stat.) +/- 0.034(syst.)], respectively. This result is consistent at the 98% level with the standard model. A measurement with f(0) fixed to the value from the standard model yields f(+) = 0.010 +/- 0.037[+/- 0.022(stat.) +/- 0.030(syst.).].
引用
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页数:18
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