4.7 Article

Four-loop singlet contribution to the electroweak ρ parameter

Journal

PHYSICS LETTERS B
Volume 622, Issue 1-2, Pages 124-130

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2005.06.085

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We compute the four-loop QCD contribution to the electroweak rho parameter induced by the singlet diagrams of the Z-boson self-energy. The numerical impact on the weak mixing angle and the W-boson mass is small. (c) 2005 Elsevier B.V. All rights reserved.

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