One-loop Self-energies in the Electroweak Model with Nonlinearly Realized Gauge Group

TL;DR

This paper calculates one-loop self-energies of W and Z bosons in a nonlinear electroweak model without a Higgs, estimating parameters through data fitting and verifying unitarity and divergence absence.

Contribution

It provides the first detailed one-loop self-energy calculations in a nonlinear gauge framework for the electroweak model without a Higgs boson.

Findings

Estimated model parameters from leptons and gauge bosons data.

Confirmed physical unitarity and no infrared divergences in the model.

Validated the use of Landau gauge for these calculations.

Abstract

We evaluate at one loop the self-energies in generic D dimensions for the W,Z mesons in the Electroweak model where the gauge group is nonlinearly realized. In this model the Higgs boson parameters are absent, while a second mass parameter appears together with a scale for the radiative corrections. We estimate these parameters in a simplified fit on leptons and gauge bosons data. We check physical unitarity and the absence of infrared divergences. Landau gauge is used.