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

被引：43

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：

巴西圣保罗研究基金会; 瑞典研究理事会; 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

页数：18

共 23 条

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