One-loop self-energies in the electroweak model with a nonlinearly realized gauge group

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 para...

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Príomhchruthaitheoirí: Bettinelli, D., Ferrari, Ruggero, Quadri, A.
Rannpháirtithe: Massachusetts Institute of Technology. Center for Theoretical Physics
Formáid: Alt
Teanga:en_US
Foilsithe / Cruthaithe: American Physical Society 2010
Rochtain ar líne:http://hdl.handle.net/1721.1/51876
Cur síos
Achoimre: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.