par Abreu, Pedro;Bertrand, Daniel 
; [et al.]
Référence Physics letters. Section B, 418, page (430-442)
Publication Publié, 1998
; [et al.]Référence Physics letters. Section B, 418, page (430-442)
Publication Publié, 1998
Article révisé par les pairs
| Résumé : | The value of the b quark mass at the M2 scale defined in the MS renormalization scheme, mb(MZ), was determined using 2.8 million hadronic Z decays collected during 1992-1994 by the DELPHI detector to be mb(MZ) = 2.67 ± 0.25 (stat.) ± 0.34 (frag.) ± 0.27 (theo.) GeV/c2. 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 MZ. This is the first time that such a measurement is performed far above the bb̄ production threshold. The study also verifies the flavour independence of the strong coupling constant for b and light quarks within 1% accuracy. © 1998 Elsevier Science B.V. |
