Two-loop electroweak corrections to the ρ parameter beyond the leading approximation

1995/07/08 by Joannis Papavassiliou, Kostas Philippides, Ken Sasaki · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.53.3942

published as Phys.Rev.D53:3942-3961,1996 · 40 pages, TeXsis, uu encoded ps files, 14 figures included

arxiv created 1995/07/08 · openalex publication_date 1996/04/01 · arxiv updated 2011/01/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04

Abstract

We show that in the framework of the pinch technique the universal part of the \ensuremathρ parameter can be meaningfully defined, beyond one loop. The universal part so obtained satisfies the crucial requirements of gauge independence, finiteness, and process independence, even when subleading contributions of the top quark are included. The mechanism which enforces the aforementioned properties is explained in detail, and several subtle field theoretical issues are discussed. Explicit calculations of the subleading two-loop corrections of order O(G_\mathrm\ensuremathμ²m_tMZ²²) are carried out in the context of an SU(2) model, with M_W=M_Z, and various intermediate and final results are reported. \textcopyright 1996 The American Physical Society.

Citations

• Current algebra formulation of radiative corrections in gauge theories and the universality of the weak interactions
• Dynamical mass generation in continuum quantum chromodynamics

Cited by

• Electroweak pinch technique to all orders