Measurement of neutral-current four-fermion production at LEP2

被引：7

作者：

Abbiendi, G ^{[1
]}

Ainsley, C

Akesson, PF

Alexander, G

Allison, J

Amaral, P

Anagnostou, G

Anderson, KJ

Arcelli, S

Asai, S

Axen, D

Azuelos, G

Bailey, I

Barberio, E

Barlow, RJ

Batley, RJ

Bechtle, P

Behnke, T

Bell, KW

Bell, PJ

Bella, G

Bellerive, A

Benelli, G

Bethke, S

Biebel, O

Bloodworth, IJ

Boeriu, O

Bock, P

Bonacorsi, D

Boutemeur, M

Braibant, S

Brigliadori, L

Brown, RM

Buesser, K

Burckhart, HJ

Campana, S

Carnegie, RK

Caron, B

Carter, AA

Carter, JR

Chang, CY

Charlton, DG

Csilling, A

Cuffiani, M

Dado, S

Dallavalle, GM

Dallison, S

De Roeck, A

De Wolf, EA

Desch, K

机构：

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[24] UCL, London WC1E 6BT, England

[25] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany

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

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

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

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

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

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

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

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

[34] Cavendish Lab, Cambridge CB3 0HE, England

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

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

[37] Univ Min & Met Krakow, Krakow, Poland

[38] Univ Instelling Antwerp, Dept Phys, B-2610 Antwerp, Belgium

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

[40] Res Inst Particle & Nucl Phys, Budapest, Hungary

[41] MPI Extraterr Phys, Munich, Germany

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

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

来源：

PHYSICS LETTERS B | 2002年 / 544卷 / 3-4期

基金：

美国国家科学基金会; 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;

关键词：

D O I：

10.1016/S0370-2693(02)02468-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Four-fermion final states q (q) over bare(+)e(-) and q (q) over bar mu(+)mu(-) from neutral-current interactions in e(+)e(-) collisions are studied in the OPAL detector at LEP at centre-of-mass energies from 183 GeV to 209 GeV. The data analysed correspond to a total integrated luminosity of about 650 pb(-1) recorded from 1997 to 2000. Corresponding to the acceptance of the OPAL detector, a signal definition is applied requiring both leptons to have a scattering angle satisfying /costheta/ < 0.95. Further requirements are made on the invariant masses of the fermion pairs. The extracted cross-sections for the processes e(+)e(-) --> q (q) over bare(+)e(-) and e(+)e(-) --> q (q) over bar mu(+)mu(-) are consistent with the expectations from the Standard Model. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：259 / 273

页数：15

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