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arxiv: hep-ph/0504055 · v2 · submitted 2005-04-07 · ✦ hep-ph

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Four-Loop Singlet Contribution to the rho Parameter

Y. Schroder , M. Steinhauser
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classification ✦ hep-ph
keywords bosoncontributionfour-loopparametersingletanglecomputediagrams
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We compute the four-loop 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.

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  1. Three loop QCD corrections to electroweak radiative parameters

    hep-ph 2026-04 unverdicted novelty 4.0

    Three-loop QCD corrections to electroweak radiative parameters Δρ, Δr, and Δκ are computed, yielding an updated W boson mass prediction relevant for FCC precision targets.