Search for flavor changing neutral currents in decays of top quarks

被引：44

作者：

Abazov, V. M. ^{[1
]}

Abbott, B. ^{[78
]}

Acharya, B. S. ^{[32
]}

Adams, M. ^{[54
]}

Adams, T. ^{[52
]}

Alexeev, G. D. ^{[1
]}

Alkhazov, G. ^{[42
]}

Alton, A. ^{[66
]}

Alverson, G. ^{[65
]}

Alves, G. A. ^{[3
]}

Ancu, L. S. ^{[38
]}

Aoki, M. ^{[53
]}

Arov, M. ^{[63
]}

Askew, A. ^{[52
]}

Asman, B. ^{[45
,46
]}

Atramentov, O. ^{[70
]}

Avila, C. ^{[10
]}

BackusMayes, J. ^{[85
]}

Badaud, F. ^{[14
]}

Bagby, L. ^{[53
]}

Baldin, B. ^{[53
]}

Bandurin, D. V. ^{[52
]}

Banerjee, S. ^{[32
]}

Barberis, E. ^{[65
]}

Baringer, P. ^{[61
]}

Barreto, J. ^{[4
]}

Bartlett, J. F. ^{[53
]}

Bassler, U. ^{[20
]}

Bazterra, V. ^{[54
]}

Beale, S. ^{[7
,8
]}

Bean, A. ^{[61
]}

Begalli, M. ^{[4
]}

Begel, M. ^{[76
]}

Belanger-Champagne, C. ^{[45
,46
]}

Bellantoni, L. ^{[53
]}

Beri, S. B. ^{[30
]}

Bernardi, G. ^{[18
,19
]}

Bernhard, R. ^{[25
]}

Bertram, I. ^{[47
]}

Besancon, M. ^{[20
]}

Beuselinck, R. ^{[48
]}

Bezzubov, V. A. ^{[41
]}

Bhat, P. C. ^{[53
]}

Bhatnagar, V. ^{[30
]}

Blazey, G. ^{[55
]}

Blessing, S. ^{[52
]}

Bloom, K. ^{[69
]}

Boehnlein, A. ^{[53
]}

Boline, D. ^{[75
]}

Bolton, T. A. ^{[62
]}

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] York Univ, Toronto, ON M3J 2R7, Canada

[8] Simon Fraser Univ, Vancouver, BC, 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, CR-16635 Prague, Czech Republic

[13] Univ San Francisco Quito, Quito, Ecuador

[14] Univ Blaise Pascal, LPC, CNRS, IN2P3, Clermont, France

[15] Univ Grenoble 1, CNRS, LPSC, Inst Natl Polytech Grenoble,IN2P3, Grenoble, France

[16] Univ Aix Marseille 1, CPPM, CNRS, IN2P3, Marseille, France

[17] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France

[18] Univ Paris 06, LPNHE, Paris, France

[19] Univ Paris 07, CNRS, IN2P3, Paris, France

[20] SPP, CEA, Saclay, France

[21] Univ Strasbourg, IPHC, CNRS, IN2P3, Strasbourg, France

[22] Univ Lyon, Lyon, France

[23] Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France

[24] Rhein Westfal TH Aachen, Phys Inst A 1, Aachen, Germany

[25] Univ Freiburg, Inst Phys, Freiburg, Germany

[26] Univ Gottingen, Inst Phys 2, Gottingen, Germany

[27] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany

[28] Univ Munich, Munich, Germany

[29] Berg Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany

[30] Panjab Univ, Chandigarh 160014, India

[31] Univ Delhi, Delhi 110007, India

[32] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[33] Univ Coll Dublin, Dublin 2, Ireland

[34] Korea Univ, Korea Detector Lab, Seoul, South Korea

[35] CINVESTAV, Mexico City 14000, DF, Mexico

[36] FOM Inst NIKHEF, Amsterdam, Netherlands

[37] Univ Amsterdam, NIKHEF, Amsterdam, Netherlands

[38] Radboud Univ Nijmegen, NIKHEF, NL-6525 ED Nijmegen, Netherlands

[39] Inst Theoret & Expt Phys, Moscow 117259, Russia

[40] Moscow MV Lomonosov State Univ, Moscow, Russia

[41] Inst High Energy Phys, Protvino, Russia

[42] Petersburg Nucl Phys Inst, St Petersburg, Russia

[43] ICREA, Barcelona, Spain

[44] IFAE, Barcelona, Spain

[45] Uppsala Univ, Uppsala, Sweden

[46] Stockholm Univ, S-10691 Stockholm, Sweden

[47] Univ Lancaster, Lancaster LA1 4YB, England

[48] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England

[49] Univ Manchester, Manchester M13 9PL, Lancs, England

[50] Univ Arizona, Tucson, AZ 85721 USA

来源：

PHYSICS LETTERS B | 2011年 / 701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：

Tevatron; D0; Top quark; Flavor changing neutral current; P(P)OVER-BAR COLLISIONS; ROOT-S; COUPLINGS;

D O I：

10.1016/j.physletb.2011.06.014

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a search for flavor changing neutral currents in decays of top quarks. The analysis is based on a search for t (t) over bar -> l'vl (l) over bar + jets (l, l' = e. mu) final states using 4.1 fb(-1) of integrated luminosity of p (p) over bar collisions at root s = 1.96 TeV. We extract limits on the branching ratio B(t -> Zq) (q = u, c quarks), assuming anomalous tuZ or tcZ couplings. We do not observe any sign of such anomalous coupling and set a limit of B < 3.2% at 95% C.L. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：313 / 320

页数：8

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