Quark mass corrections to the {ital Z} boson decay rates
- Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403 (United States)
The results of a perturbative QCD evaluation of the {approximately}{ital m}{sup 2}{sub {ital f}}/{ital M}{sup 2}{sub {ital Z}} contributions to {Gamma}{sub {ital Z}{r_arrow}{ital b{bar b}}} and {Gamma}{sub {ital Z}{r_arrow}hadrons} for the quark masses {ital m}{sub {ital f}}{lt}{ital M}{sub {ital Z}} are presented. The recent results due to the combination of renormalization group constraints and the results of several other calculations are independently confirmed by direct computation. Some existing confusion in the literature is clarified. In addition, the calculated {ital O}({alpha}{sup 2}{sub {ital s}}) correction to the correlation function in the axial channel is a necessary ingredient for the yet uncalculated axial part of the {ital O}({alpha}{sup 3}{sub {ital s}}) mass correction to the {ital Z} decay rates. The results can be applied to the {tau} hadronic width. {copyright} {ital 1996 The American Physical Society.}
- DOE Contract Number:
- FG06-85ER40224
- OSTI ID:
- 286422
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 3 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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