One-loop self-energies in the electroweak model with a nonlinearly realized gauge group
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We evaluate at one loop the self-energies 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. As a reference for future higher order computations, the regularized D-dimensional amplitudes are provided. Eventually the limit D→4 is taken on physical amplitudes.
Date issued
2009-06Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review D
Publisher
American Physical Society
Citation
Bettinelli, D. , R. Ferrari, and A. Quadri. “One-loop self-energies in the electroweak model with a nonlinearly realized gauge group.” Physical Review D 79.12 (2009): 125028. © 2009 The American Physical Society
Version: Final published version
ISSN
1550-2368
1550-7998