Search for production of single top quarks via tcg and tug flavor-changing-neutral-current couplings

被引：42

作者：

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

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.

Barnes, C.

Barreto, J.

Bartlett, J. F.

Bassler, U.

Bauer, D.

Beale, S.

Bean, A.

Begalli, M.

Begel, M.

Belanger-Champagne, C.

机构：

[1] Radboud Univ Nijmegen, NIKHEF, Nijmegen, Netherlands

[2] Univ Buenos Aires, Buenos Aires, DF, Argentina

[3] Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil

[4] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil

[5] Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil

[6] Univ Alberta, Edmonton, AB, Canada

[7] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada

[8] York Univ, Toronto, ON M3J 2R7, 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 Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic

[15] Univ San Francisco Quito, Quito, Ecuador

[16] Univ Clermont Ferrand, IN2P3, Phys Corpusculaire Lab, CNRS, Clermont Ferrand, France

[17] Univ Grenoble 1, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, France

[18] Univ Aix Marseille 2, IN2P3, CPPM, CNRS, Marseille, France

[19] CNRS, IN2P3, Lab Accelerateur Lineaire, Orsay, France

[20] Univ Paris 11, Orsay, France

[21] Univ Paris 06, IN2P3, LPNHE, CNRS, Paris, France

[22] Univ Paris 07, IN2P3, LPNHE, CNRS, Paris, France

[23] CEA Saclay, Serv Phys Particules, DAPNIA, Gif Sur Yvette, France

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

[25] Univ Haute Alsace, Mulhouse, France

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

[27] Univ Lyon, Lyon, France

[28] Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany

[29] Univ Bonn, Inst Phys, D-5300 Bonn, Germany

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

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

[32] Univ Munich, Munich, Germany

[33] Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany

[34] Panjab Univ, Chandigarh 160014, India

[35] Univ Delhi, Delhi 110007, India

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

[37] Univ Coll Dublin, Dublin 2, Ireland

[38] Korea Univ, Korea Detector Lab, Seoul 136701, South Korea

[39] Sungkyunkwan Univ, Suwon, South Korea

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

[41] FOM Inst NIKHEF, Amsterdam, Netherlands

[42] Univ Amsterdam, NIKHEF, Amsterdam, Netherlands

[43] Joint Inst Nucl Res, Dubna, Russia

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

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

[46] Inst High Energy Phys, Protvino, Russia

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

[48] Lund Univ, Lund, Sweden

[49] Royal Inst Technol, Stockholm, Sweden

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

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 19期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevLett.99.191802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We search for the production of single top quarks via flavor-changing-neutral-current couplings of a gluon to the top quark and a charm (c) or up (u) quark. We analyze 230 pb(-1) of lepton+jets data from p (p) over tilde collisions at a center of mass energy of 1.96 TeV collected by the D0 detector at the Fermilab Tevatron Collider. We observe no significant deviation from standard model predictions, and hence set upper limits on the anomalous coupling parameters kappa(c)(g)/Lambda and kappa(u)(g)/Lambda, where kappa(g) define the strength of tcg and tug couplings, and Lambda defines the scale of new physics. The limits at 95% C.L. are kappa(c)(g)/Lambda < 0.15 TeV-1 and kappa(u)(g)/Lambda < 0.037 TeV-1.

引用

页数：8

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