Search for single top quark production at LEP2

被引：66

作者：

Abbiendi, G ^{[1
]}

Ainsley, C

Åkesson, PF

Alexander, G

Allison, J

Anagnostou, G

Anderson, KJ

Arcelli, S

Asai, S

Axen, D

Azuelos, G

Bailey, I

Barberio, E

Barlow, RJ

Batley, RJ

Behnke, T

Bell, KW

Bell, PJ

Bella, G

Bellerive, A

Benelli, G

Bethke, S

Biebel, O

Bloodworth, IJ

Boeriu, O

Bock, P

Böhme, J

Bonacorsi, D

Boutemeur, M

Braibant, S

Brigliadori, L

Brown, RM

Burckhart, HJ

Cammin, J

Carnegie, RK

Caron, B

Carter, AA

Carter, JR

Chang, CY

Charlton, DG

Clarke, PEL

Clay, E

Cohen, I

Couchman, J

Csilling, A

Cuffiani, M

Dado, S

Dallavalle, GM

Dallison, S

De Roeck, A

机构：

[1] Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy

[2] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[3] Ist Nazl Fis Nucl, I-40126 Bologna, Italy

[4] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[5] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA

[6] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[7] Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada

[8] CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland

[9] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[10] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[11] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

[12] Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany

[13] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[14] Queen Mary Univ London, London E1 4NS, England

[15] Tech Hsch Aachen, Inst Phys 3, D-52056 Aachen, Germany

[16] UCL, London WC1E 6BT, England

[17] Univ Manchester, Schuster Lab, Dept Phys, Manchester M13 9PL, Lancs, England

[18] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[19] Univ Montreal, Phys Nucl Lab, Montreal, PQ H3C 3J7, Canada

[20] Univ Oregon, Dept Phys, Eugene, OR 97403 USA

[21] CLRC, Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[22] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[23] Tel Aviv Univ, Dept Phys & Astron, IL-69978 Tel Aviv, Israel

[24] Univ Tokyo, Int Ctr Elementary Particle Phys, Tokyo 1130033, Japan

[25] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[26] Kobe Univ, Kobe, Hyogo 6578501, Japan

[27] Weizmann Inst Sci, Particle Phys Dept, IL-76100 Rehovot, Israel

[28] Univ Hamburg, DESY, Inst Expt Phys 2, D-22607 Hamburg, Germany

[29] Univ Victoria, Dept Phys, Victoria, BC V8W 3P6, Canada

[30] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada

[31] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

[32] Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary

[33] Inst Nucl Res, H-4001 Debrecen, Hungary

[34] Univ Munich, Sekt Phys, D-85748 Garching, Germany

[35] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[36] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[37] TRIUMF, Vancouver, BC V6T 2A3, Canada

[38] Univ Debrecen, Dept Expt Phys, Debrecen, Hungary

[39] Max Planck Inst, Munich, Germany

[40] Univ Calif Riverside, High Energy Phys Grp, Riverside, CA 92521 USA

[41] CERN, Div EP, CH-1211 Geneva 23, Switzerland

[42] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

来源：

PHYSICS LETTERS B | 2001年 / 521卷 / 3-4期

基金：

加拿大自然科学与工程研究理事会; 以色列科学基金会; 日本学术振兴会; 美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(01)01195-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for single top quark production via flavour changing neutral currents (FCNC) was performed with data collected by the OPAL detector at the e(+)e(-) collider LEP. Approximately 600 pb(-1) of data collected at roots = 189-209 GeV were used to search for the FCNC process e(+)e(-) --> tc(u) --> bWc(u). This analysis is sensitive to the leptonic and the hadronic decay modes of the W boson. No evidence for a FCNC process is observed. Upper limits at the 95% confidence level on the single top production cross-section as a function of the centre-of-mass energy are derived. Limits on the anomalous coupling parameters K(gamma) and K(Z) are determined from these results. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：181 / 194

页数：14

共 57 条

[31] Constraints on top couplings in models with exotic quarks [J].