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

Authors
Abbiendi, G Ainsley, C Akesson, 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 Bohme, 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 De Roeck, A De Wolf, EA Dervan, P Desch, K Dienes, B Dixit, MS Donkers, M Dubbert, J Duchovni, E Duckeck, G Duerdoth, IP Estabrooks, PG Etzion, E Fabbri, F Fanti, M Feld, L Ferrari, P Fiedler, F Fleck, I Ford, M Frey, A Furtjes, A Futyan, DI Gagnon, P Gary, JW Gaycken, G Geich-Gimbel, C Giacomelli, G Giacomelli, P Glenzinski, D Goldberg, J Grandi, C Graham, K Gross, E Grunhaus, J Gruwe, M Gunther, PO Gupta, A Hajdu, C Hanson, GG Harder, K Harel, A Harin-Dirac, M Hauschild, M Hawkes, CM Hawkings, R Hemingway, RJ Hensel, C Herten, G Heuer, RD Hill, JC Hoffman, K Homer, RJ Honma, AK Horvath, D Hossain, KR Howard, R Huntemeyer, P Igo-Kemenes, P Ishii, K Jawahery, A Jeremie, H Jones, CR Jovanovic, P Junk, TR Kanaya, N Kanzaki, J Karapetian, G Karlen, D Kartvelishvili, V Kawagoe, K Kawamoto, T Keeler, RK Kellogg, RG Kennedy, BW Kim, DH Klein, K Klier, A Kluth, S Kobayashi, T Kobel, M Kokott, TP Komamiya, S Kowalewski, RV Kramer, T Kress, T Krieger, P von Krogh, J Krop, D Kuhl, T Kupper, H Kyberd, P Lafferty, GD Landsman, H Lanske, D Lawson, I Layter, JG Leins, A Lellouch, D Letts, J Levinson, L Liebisch, R Lillich, J Littlewood, C Lloyd, AW Lloyd, SL Loebinger, FK Long, GD Losty, MJ Lu, J Ludwig, J Macchiolo, A Macpherson, A Mader, W Marcellini, S Marchant, TE Martin, AJ Martin, JP Martinez, G Mashimo, T Mattig, P McDonald, WJ McKenna, J McMahon, TJ McPherson, RA Meijers, F Mendez-Lorenzo, P Menges, W Merritt, FS Mes, H Michelini, A Mihara, S Mikenberg, G Miller, DJ Mohr, W Montanari, A Mori, T Nagai, K Nakamura, I Neal, HA Nisius, R O'Neale, SW Oakham, FG Odorici, F Oh, A Okpara, A Oreglia, MJ Orito, S Pahl, C Pasztor, G Pater, JR Patrick, GN Pilcher, JE Pinfold, J Plane, DE Poli, B Polok, J Pooth, O Quadt, A Rabbertz, K Rembser, C Renkel, P Rick, H Rodning, N Roney, JM Rosati, S Roscoe, K Rossi, AM Rozen, Y Runge, K Runolfsson, O Rust, DR Sachs, K Saeki, T Sahr, O Sarkisyan, EKG Sbarra, C Schaile, AD Schaile, O Scharff-Hansen, P Schroder, M Schumacher, M Schwick, C Scott, WG Seuster, R Shears, TG Shen, BC Shepherd-Themistocleous, CH Sherwood, P Siroli, GP Skuja, A Smith, AM Snow, GA Sobie, R Soldner-Rembold, S Spagnolo, S Spano, F Sproston, M Stahl, A Stephens, K Strom, D Strohmer, R Stumpf, L Surrow, B Talbot, SD Tarem, S Tasevsky, M Taylor, RJ Teuscher, R Thomas, J Thomson, MA Torrence, E Towers, S Toya, D Trefzger, T Trigger, I Trocsanyi, Z Tsur, E Turner-Watson, MF Ueda, I Vachon, B Vollmer, CF Vannerem, P Verzocchi, M Voss, H Vossebeld, J Waller, D Ward, CP Ward, DR Watkins, PM Watson, AT Watson, NK Wells, PS Wengler, T Wermes, N Wetterling, D White, JS Wilson, GW Wilson, JA Wyatt, TR Yamashita, S Zacek, V Zer-Zion, D
Citation
G. Abbiendi et al., A simultaneous measurement of the QCD colour factors and the strong coupling, EUR PHY J C, 20(4), 2001, pp. 601-615
Citations number
59
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
20
Issue
4
Year of publication
2001
Pages
601 - 615
Database
ISI
SICI code
1434-6044(200105)20:4<601:ASMOTQ>2.0.ZU;2-4
Abstract
Using data from e(+)e(-) annihilation into hadrons, taken with the OPAL det ector at LEP at the Z pole between 1991 and 1995, we performed a simultaneo us measurement of the colour factors of the underlying gauge group of the s trong interaction, C-F and C-A, and the strong coupling, alpha (s). The mea surement was carried out by fitting next-to-leading order perturbative pred ictions to measured angular correlations of 4-jet events together with mult i-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-ab elian gauge symmetry and standard hadronization models. The measurements ar e in agreement with SU(3) expectations for C-F and C-A and the world averag e of alpha (s)(M-Z).