Two loop large top mass corrections to electroweak parameters: Analytic results valid for arbitrary Higgs mass

Aug, 1994
35 pages
Published in:
  • Phys.Rev.D 51 (1995) 3820-3837
Report number:
  • PSI-PR-94-26

Citations per year

1995200220092016202302468
Abstract: (APS)
We present analytic results for the two-loop leading heavy top-quark contributions as required for precise predictions of electroweak observables. The Higgs boson mass is kept arbitrary. We discuss a set of recurrence relations for diagrams with three masses at zero momentum, which allow one to reduce the calculation to a few master integrals. Simple analytic expressions are obtained for the ρ parameter and for the Zbb¯ vertex. Results are pesented for the on-shell and the MS¯ definition of the top quark mass. We explicitly discuss and verify the validity of Ward-Takahashi identities and check that the use of an anticommuting γ5 preserves the latter.
  • electroweak interaction: rho parameter
  • rho parameter: electroweak interaction
  • mass: top
  • top: mass
  • correction: higher-order
  • Higgs particle: mass
  • mass: Higgs particle
  • vertex function: (Z0 quark antiquark)
  • bottom
  • Ward-Takahashi identity