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
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
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