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

Details Nonfactorizable QCD and Electroweak Corrections to the Hadronic Z Boson Decay Rate Nonfactorizable QCD and Electroweak Corrections to the Hadronic Z Boson Decay Rate

1996-08-19

arxiv.org/abs/hep-ph/9608366v2

Phys.Rev.Lett. 77 (1996) 3955-3958

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, Revtex

Scientific paper

10.1103/PhysRevLett.77.3955

We present an analysis of two-loop mixed QCD and electroweak corrections to the decay of the 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 Z boson by approximately -0.55(3) MeV and increase the central value of the strong coupling constant determined at LEP by 0.001.

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