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11 papers · 2 filters
Application of the Pinch Technique to Neutral Current Amplitudes and the Concept of the Z Mass
Kostas Philippides, Alberto Sirlin
The pinch technique (PT) is applied to neutral current amplitudes, focusing on the mixing problem. Extending recent arguments due to Papavassiliou and Pilaftsis, it is shown that t…
Gauge-independent Thermal Function In Yang-Mills Theory
Ken Sasaki
It is proposed to use the pinch technique (PT) to obtain the gauge-independent thermal function in a hot Yang-Mills gas. Calculations of the thermal function are performed…
Two-loop electroweak corrections to the parameter beyond the leading approximation
Joannis Papavassiliou, Kostas Philippides, Ken Sasaki
We show that in the framework of the pinch technique the universal part of the parameter can be meaningfully defined, beyond one loop. The universal part so obtained satisfies…
A Gauge-Independent Approach to Resonant Transition Amplitudes
Joannis Papavassiliou, Apostolos Pilaftsis
We present a new gauge-independent approach to resonant transition amplitudes with nonconserved external currents, based on the pinch technique method. In the context of a…
Gauge Invariance and Unstable Particles
Joannis Papavassiliou, Apostolos Pilaftsis
A gauge-independent approach to resonant transition amplitudes with nonconserved external currents is presented, which is implemented by the pinch technique. The analytic expressio…
Renormalon contributions to δρ
Paolo Gambino, Alberto Sirlin
Leading QCD vacuum polarization contributions to the electroweak parameter are evaluated numerically using several different prescriptions for the gluon self-energy. Simple th…