A simultaneous measurement of the QCD colour factors and the strong coupling

被引：43

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

Ball, H

Barberio, E

Barlow, RJ

Batley, RJ

Behnke, T

Bell, KW

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

Capiluppi, P

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

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

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

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

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

[8] Carleton Univ, Ctr Res Particle Phys, Ottawa, ON K1S 5B6, Canada

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[32] UCL, London WC1E 6BT, England

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

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

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

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

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

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

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

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

[41] MPI Extraterr Phys, Munich, Germany

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

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

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

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

来源：

EUROPEAN PHYSICAL JOURNAL C | 2001年 / 20卷 / 04期

关键词：

D O I：

10.1007/s100520100699

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Using data from e(+)e(-) annihilation into hadrons, taken with the OPAL detector at LEP at the Z pole between 1991 and 1995, we performed a simultaneous measurement of the colour factors of the underlying gauge group of the strong interaction, C-F and C-A, and the strong coupling, alpha (s). The measurement was carried out by fitting next-to-leading order perturbative predictions to measured angular correlations of 4-jet events together with multi-jet related variables. Our results, C-A = 3.02 +/- 0.25(stat.) +/- 0.49(syst.), CF = 1.34 +/- 0.13(stat.) +/- 0.22(syst.), alpha (s) (M-Z) = 0.120 +/- 0.011(stat.) +/- 0.020(syst,), provide a test of perturbative QCD in which the only assumptions are non-abelian gauge symmetry and standard hadronization models. The measurements are in agreement with SU(3) expectations for C-F and C-A and the world average of alpha (s)(M-Z).

引用

页码：601 / 615

页数：15

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