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
收藏
页码:601 / 615
页数:15
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