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Andersson, P; Andreazza, A; Augustinus, A; Beilliere, P; Belokopytov, Yu; Berat, C; Bertrand, D; Bonivento, W; Borisov, G; Brenke, T; Cabrera, S; Camacho Rozas, A.J; Canepa, M; Chaussard, L; Chudoba, J; Cortina, E; Crennell, D; Dahm, J; Damgaard, G; Dauncey, P.D; Della Ricca, G; De Boer, W; De Lotto, B; De Paula, L; Dris, M; Durand, J-D; Edsall, D; Ellert, M; Engel, J-P; Espirito Santo, M; Firestone, A; Fulda-Quenzer, F; Garcia, C; Gaspar, C; Gavillet, Ph; Golob, B; Gorski, M; Green, C; Hahn, F; Hahn, S; Haider, S; Hamacher, K; Heuser, J.-M; Jarlskog, Ch; Kapusta, F; Keranen, R; Kostioukhine, V; Krumstein, Z; Lacasta, C; Lane, D.W; Langefeld, P; Legan, C.K; Leisos, A; Lopez, J.M; Mahon, J.R; Martinez-Vidal, F; Matteuzzi, C; Mc Kay, R; Meroni, C; Migliore, E; Moenig, K; Monge, M.R; Muenich, K; Mulders, M; Neumeister, N; Nicolaidou, R; Nygren, A; Obraztsov, V; Pain, R; Passeri, A; Pegoraro, M; Petrolini, A; Pol, M.E; Privitera, P; Ragazzi, S; Rahmani, H; Rames, J; Ratoff, P.N; Renton, P.B; Seitz, A; Silvestre, R; Sosnowski, R; Strub, R; Timmermans, J; Toet, D.Z; Tome, B; Treille, D; Trombini, A; Turluer, M-L; Tzamarias, S; Van Apeldoorn, G.W; Vassilopoulos, N; Vincent, P; Vodopyanov, A.S; Weiser, C; Wolf, G; Yushchenko, O; Zach, F; Zaitsev, A; Zimin, N.I
Physics letters. B, 02/1998, Letnik: 418, Številka: 3Journal Article
The value of the b quark mass at the M Z scale defined in the MS renormalization scheme, m b ( M Z ), was determined using 2.8 million hadronic Z decays collected during 1992-1994 by the DELPHI detector to be m b(M Z)=2.67±0.25 ( stat.)±0.34 ( frag.)±0.27 ( theo.) GeV/c 2 . The analysis considers NLO corrections to the three-jet production rate including mass effects, and the result obtained agrees with the QCD prediction of having a running b quark mass at an energy scale equal to M Z . This is the first time that such a measurement is performed far above the b b production threshold. The study also verifies the flavour independence of the strong coupling constant for b and light quarks within 1% accuracy.
