Nonfactorizable QCD and Electroweak Corrections to the Hadronic {ital Z} Boson Decay Rate

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.3955· OSTI ID:389384

Czarnecki, A; Kuehn, J H ^[1]

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1. Institut fuer Theoretische Teilchenphysik, Universitaet Karlsruhe, D-76128 Karlsruhe (Germany)

We present an analysis of two-loop mixed QCD and electroweak corrections to the decay of the {ital Z} boson into light quarks. We find that the naive factorization of QCD and electroweak corrections does not describe correctly the two-loop effects. The nonfactorizable corrections shift the width of the {ital Z} boson by approximately {minus}0.59(3) MeV and increase the central value of the strong coupling constant determined at the CERN {ital e}{sup +}{ital e}{sup {minus}} collider LEP by 0.001. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 389384
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CORRECTIONS
COUPLING CONSTANTS
FACTORIZATION
QUANTUM CHROMODYNAMICS
QUARKS
WEAK HADRONIC DECAY
Z NEUTRAL BOSONS