Search for right-handed W bosons in top quark decay -: art. no. 011104

被引：22

作者：

Abazov, VM ^{[1
]}

Abbott, B

Abolins, M

Acharya, BS

Adams, M

Adams, T

Agelou, M

Agram, JL

Ahn, SH

Ahsan, M

Alexeev, GD

Alkhazov, G

Alton, A

Alverson, G

Alves, GA

Anastasoaie, M

Andeen, T

Anderson, S

Andrieu, B

Arnoud, Y

Askew, A

Åsman, B

Jesus, ACSA

Atramentov, O

Autermann, C

Avila, C

Badaud, F

Baden, A

Baldin, B

Balm, PW

Banerjee, S

Barberis, E

Bargassa, P

Baringer, P

Barnes, C

Barreto, J

Bartlett, JF

Bassler, U

Bauer, D

Bean, A

Beauceron, S

Begel, M

Bellavance, A

Beri, SB

Bernardi, G

Bernhard, R

Bertram, I

Besançon, M

Beuselinck, R

Bezzubov, VA

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, Rio De Janeiro, Brazil

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

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

[6] Univ Alberta, Edmonton, AB, Canada

[7] McGill Univ, Montreal, PQ, Canada

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

[9] Inst High Energy Phys, Beijing 100039, Peoples R China

[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 Clermont Ferrand, Lab Phys Corpusculaire, CNRS, Clermont Ferrand, France

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

[18] Univ Mediterranee, CPPM, CNRS, Marseille, France

[19] CNRS, Lab Accelerateur Lineaire, F-91405 Orsay, France

[20] Univ Paris 06, LPNHE, CNRS, Paris, France

[21] Univ Paris 07, LPNHE, CNRS, Paris, France

[22] CEA Saclay, DAPNIA, Serv Phys Particules, Saclay, France

[23] Univ Strasbourg, IReS, CNRS, Strasbourg, France

[24] Univ Haute Alsace, Mulhouse, France

[25] Univ Lyon 1, Inst Phys Nucl Lyon, CNRS, F-69622 Villeurbanne, France

[26] Rhein Westfal TH Aachen, Phys Inst A, 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 136701, South Korea

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

[38] NIKHEF H, FOM Inst, Amsterdam, Netherlands

[39] Univ Amsterdam, NIKHEF H, Amsterdam, Netherlands

[40] Radboud Univ Nijmegen, NIKHEF H, Nijmegen, Netherlands

[41] Joint Nucl Res Inst, Dubna, Russia

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

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

[44] Inst High Energy Phys, Protvino, Russia

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

[46] Lund Univ, Lund, Sweden

[47] Royal Inst Technol, Stockholm, Sweden

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

[49] Uppsala Univ, Uppsala, Sweden

[50] Univ Lancaster, Lancaster, England

来源：

PHYSICAL REVIEW D | 2005年 / 72卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.72.011104

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a measurement of the fraction f(+) of right-handed W bosons produced in top quark decays, based on a candidate sample of t (t) over bar events in the lepton+jets decay mode. These data correspond to an integrated luminosity of 230 pb(-1), collected by the D0 detector at the Fermilab Tevatron p (p) over bar Collider at root s=1.96 TeV. We use a constrained fit to reconstruct the kinematics of the t (t) over bar and decay products, which allows for the measurement of the leptonic decay angle theta(*) for each event. By comparing the cos theta(*) distribution from the data with those for the expected background and signal for various values of f(+), we find f(+)=0.00 +/- 0.13(stat)+/- 0.07(syst). This measurement is consistent with the standard model prediction of f(+)=3.6 x 10(-4).

引用

页码：1 / 8

页数：8

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