m(b) at M-Z

Journal article

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.

Authors: Abreu, P; Adam, W; Adye, T; Adzic, P; Ajinenko, I

• Publication status: Published
• Journal: Physics Letters B
• Volume: 418
• Issue: 3-4
• Pages: 430-442
• Publication date: 1998-02-05
• DOI: 10.1016/S0370-2693(97)01442-1
• ISSN: 0370-2693
• Language: English