Test of the flavour independence of alpha(s) using next-to-leading order calculations for heavy quarks

Authors
Abbiendi, G Ackerstaff, K Alexander, G Allison, J Altekamp, N Anderson, KJ Anderson, S Arcelli, S Asai, S Ashby, SF Axen, D Azuelos, G Ball, AH Barberio, E Barlow, RJ Batley, JR Baumann, S Bechtluft, J Behnke, T Bell, KW Bella, G Bellerive, A Bentvelsen, S Bethke, S Betts, S Biebel, O Biguzzi, A Bloodworth, IJ Bock, P Bohme, J Bonacorsi, D Boutemeur, M Braibant, S Bright-Thomas, P Brigliadori, L Brown, RM Burckhart, HJ Capiluppi, P Carnegie, RK Carter, AA Carter, JR Chang, CY Charlton, DG Chrisman, D Ciocca, C Clarke, PEL Clay, E Cohen, I Conboy, JE Cooke, OC Couchman, J Couyoumtzelis, C Coxe, RL Cuffiani, M Dado, S Dallavalle, GM Davis, R De Jong, S de Roeck, A Dervan, P Desch, K Dienes, B Dixit, MS Dubbert, J Duchovni, E Duckeck, G Duerdoth, IP Estabrooks, PG Etzion, E Fabbri, F Fanfani, A Fanti, M Faust, AA Fielder, F Fierro, M Fleck, I Frey, A Furtjes, A Futyan, DI Gagnon, P Gary, JW Gascon-Shotkin, SM Gaycken, G Geich-Gimbel, C Giacomelli, G Giacomelli, P Gibson, V Gibson, WR Gingrich, DM Glenzinski, D Goldberg, J Gorn, W Grandi, C Graham, K Gross, E Grunhaus, J Gruwe, M Hajdu, C Hanson, GG Hansroul, M Hapke, M Harder, K Harel, A Hargrove, CK Harin-Dirac, M Hauschild, M Hawkes, CM Hawkings, R Hemingway, RJ Herndon, M Herten, G Heuer, RD Hildreth, MD Hill, JC Hobson, PR Hocker, A Hoffman, K Homer, RJ Honma, AK Horvath, D Hossain, KR Howard, R Huntemeyer, P Igo-Kemenes, P Imrie, DC Ishii, K Jacob, FR Jawahery, A Jeremie, H Jimack, M Jones, CR Jovanovic, P Junk, TR Kanaya, N Kanzaki, J Karlen, D Kartvelishvili, V Kawagoe, K Kawamoto, T Kayal, PI Keeler, RK Kellogg, RG Kennedy, BW Kim, DH Klier, A Kobayashi, T Kobel, M Kokott, TP Kolrep, M Komamiya, S Kowalewski, RV Kress, T Krieger, P von Krogh, J Kuhl, T Kyberd, P Lafferty, GD Landsman, H Lanske, D Lauber, J Lawson, I Layter, JG Lellouch, D Letts, J Levinson, L Liebisch, R List, B Littlewood, C Lloyd, AW Lloyd, SL Loebinger, FK Long, GD Losty, MJ Lu, J Ludwig, J Liu, D Macchiolo, A Macpherson, A Mader, W Mannelli, M Marcellini, S Martin, AJ Martin, JP Martinez, G Mashimo, T Mattig, P McDonald, WJ McKenna, J Mckigney, EA McMahon, TJ McPherson, RA Meijers, F Mendez-Lorenzo, P 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 Ogren, HO Okpara, A Oreglia, MJ Orito, S Pasztor, G Pater, JR Patrick, GN Patt, J Perez-Ochoa, R Petzold, S Pfeifenschneider, P Pilcher, JE Pinfold, J Plane, DE Poffenberger, P Poli, B Polok, J Przybycien, M Quadt, A Rembser, C Rick, H Robertson, S Robins, SA Rodning, N Roney, JM Rosati, S Roscoe, K Rossi, AM Rozen, Y Runge, K Runolfsson, O Rust, DR Sachs, K Saeki, T Sahr, O Sang, WM Sarkisyan, EKG Sbarra, C Schaile, AD Schaile, O Scharff-Hansen, P Schieck, J Schmitt, S Schoning, A Schroder, M Schumacher, M Schwick, C Scott, WG Seuster, R Shears, TG Shen, BC Shepherd-Themistocleous, CH Sherwood, P Siroli, GP Sittler, A Skuja, A Smith, AM Snow, GA Sobie, R Soldner-Rembold, S Spagnolo, S Sproston, M Stahl, A Stephens, K Steuerer, J Stoll, K Strom, D Strohmer, R Surrow, B Talbot, SD Taras, P Tarem, S Teuscher, R Theirgen, M Thomas, J Thomson, MA Torrence, E Towers, S Trigger, I Trocsanyi, Z Tsur, E Turner-Watson, MF Ueda, I van Kooten, R Vannerem, P Verzocchi, M Voss, H Wackerle, F Wagner, A Ward, CP Ward, DR Watkins, PM Watson, AT Watson, NK Wells, PS Wermes, N Wetterling, D White, JS Wilson, GW Wilson, JA Wyatt, TR Yamashita, S Zacek, V Zer-Zion, D
Citation
G. Abbiendi et al., Test of the flavour independence of alpha(s) using next-to-leading order calculations for heavy quarks, EUR PHY J C, 11(4), 1999, pp. 643-659
Citations number
50
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
14346044 → ACNP
Volume
11
Issue
4
Year of publication
1999
Pages
643 - 659
Database
ISI
SICI code
1434-6044(199912)11:4<643:TOTFIO>2.0.ZU;2-8
Abstract
We present a test of the flavour independence of the strong coupling consta nt for charm and bottom quarks with respect to light (uds) quarks, based on a hadronic event sample obtained with the OPAL detector at LEP. Five obser vables related to global event shapes were used to measure ct, in three fla vour tagged samples (uds, c and b). The event shape distributions were fitt ed by O(alpha(s)(2)) calculations of jet production taking into account mas s effects for the c and b quarks. We find: alpha(s)(c)/alpha(s)(uds) = 0.997 +/- 0.038 (stat.) +/- 0.030 (syst.) +/- 0 .012 (theory) and alpha(s)(b)/alpha(s)(uds) = 0.993 +/- 0.008 (stat.) +/- 0 .006 (syst.) +/- 0.011 (theory).