59 citations · 195 across the 10 of their papers we have counts for
7 papers · 1 filter
The pinch technique approach to gauge-independent n-point functions
N. J. Watson
The pinch technique (PT) is an algorithm for the rearrangement of contributions to conventional, gauge-dependent n-point functions in gauge theories to obtain a formulation of one-…
On The Pinch Technique Beyond One Loop
N. J. Watson
A brief account is given of the problems involved in extended the pinch technique beyond the one-loop level, and of investigations into one possible approach to solving them.
The Pinch Technique Beyond One Loop: The Gauge-Independent Two-Loop Quark Self-Energy
N. J. Watson
It is shown how the pinch technique algorithm may be consistently extended beyond the one-loop level to obtain the gauge-independent two-loop fermion self-energy -i\hatΣ^(2)(p) in…
Electroweak Effective Charges and their relation to Physical Cross Sections
J. Papavassiliou, E. de Rafael, N. J. Watson
In quantum electrodynamics with fermions f = e,μ..., knowledge of the vacuum polarization spectral function determined from the tree level e^+e^- -> f^+f^- cross sections, together…
The Gauge-Independent QCD Effective Charge
N. J. Watson
It is shown how the QED concept of a gauge-, scale- and scheme-independent one-loop effective charge can be extended directly at the diagrammatic level to QCD, thus justifying expl…
Effective Charges in Non-Abelian Gauge Theories
N. J. Watson
The question of the definition of effective charges for non-abelian gauge theories is discussed, focusing in particular on both the pinch technique and background field method appr…
CP Violating Metastable States and Baryogenesis in the Hot Standard Model
C. P. Korthals Altes, N. J. Watson
We discuss a novel form of CP violation in the standard model. It takes place at temperatures of the order of the electroweak transition, when two regions with different values of…