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Title: Bilepton effects on the WWV* vertex in the 331 model with right-handed neutrinos via a SU{sub L}(2)xU{sub Y}(1) covariant quantization scheme

Abstract

In a recent paper [J. Montano, F. Ramirez-Zavaleta, G. Tavares-Velasco, and J. J. Toscano, Phys. Rev. D 72, 055023 (2005).], we investigated the effects of the massive charged gauge bosons (bileptons) predicted by the minimal 331 model on the off-shell vertex WWV* (V={gamma}, Z) using a SU{sub L}(2)xU{sub Y}(1) covariant gauge-fixing term for the bileptons. We proceed along the same lines and calculate the effects of the gauge bosons predicted by the 331 model with right-handed neutrinos. It is found that the bilepton effects on the WWV* vertex are of the same order of magnitude as those arising from the standard model and several of its extensions, provided that the bilepton mass is of the order of a few hundred of GeVs. For heavier bileptons, their effects on the WWV* vertex are negligible. The behavior of the form factors at high energies is also discussed as it is a reflection of the gauge invariance and gauge independence of the WWV* Green function obtained via our quantization method.

Authors:
; ;  [1]
  1. Facultad de Ciencias Fisico Matematicas, Benemerita Universidad Autonoma de Puebla, Apartado Postal 1152, Puebla, Puebla (Mexico)
Publication Date:
OSTI Identifier:
21020302
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.075008; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BOSONS; FORM FACTORS; GAUGE INVARIANCE; GEV RANGE; GREEN FUNCTION; NEUTRINOS; PHOTONS; QUANTIZATION; STANDARD MODEL; SU-2 GROUPS; U-1 GROUPS; W MINUS BOSONS; W PLUS BOSONS; Z NEUTRAL BOSONS

Citation Formats

Ramirez-Zavaleta, F., Tavares-Velasco, G., and Toscano, J. J. Bilepton effects on the WWV* vertex in the 331 model with right-handed neutrinos via a SU{sub L}(2)xU{sub Y}(1) covariant quantization scheme. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.075008.
Ramirez-Zavaleta, F., Tavares-Velasco, G., & Toscano, J. J. Bilepton effects on the WWV* vertex in the 331 model with right-handed neutrinos via a SU{sub L}(2)xU{sub Y}(1) covariant quantization scheme. United States. doi:10.1103/PHYSREVD.75.075008.
Ramirez-Zavaleta, F., Tavares-Velasco, G., and Toscano, J. J. Sun . "Bilepton effects on the WWV* vertex in the 331 model with right-handed neutrinos via a SU{sub L}(2)xU{sub Y}(1) covariant quantization scheme". United States. doi:10.1103/PHYSREVD.75.075008.
@article{osti_21020302,
title = {Bilepton effects on the WWV* vertex in the 331 model with right-handed neutrinos via a SU{sub L}(2)xU{sub Y}(1) covariant quantization scheme},
author = {Ramirez-Zavaleta, F. and Tavares-Velasco, G. and Toscano, J. J.},
abstractNote = {In a recent paper [J. Montano, F. Ramirez-Zavaleta, G. Tavares-Velasco, and J. J. Toscano, Phys. Rev. D 72, 055023 (2005).], we investigated the effects of the massive charged gauge bosons (bileptons) predicted by the minimal 331 model on the off-shell vertex WWV* (V={gamma}, Z) using a SU{sub L}(2)xU{sub Y}(1) covariant gauge-fixing term for the bileptons. We proceed along the same lines and calculate the effects of the gauge bosons predicted by the 331 model with right-handed neutrinos. It is found that the bilepton effects on the WWV* vertex are of the same order of magnitude as those arising from the standard model and several of its extensions, provided that the bilepton mass is of the order of a few hundred of GeVs. For heavier bileptons, their effects on the WWV* vertex are negligible. The behavior of the form factors at high energies is also discussed as it is a reflection of the gauge invariance and gauge independence of the WWV* Green function obtained via our quantization method.},
doi = {10.1103/PHYSREVD.75.075008},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}
  • We study the one-loop sensitivity of the WWV (V={gamma},Z) vertex to the new massive gauge bosons predicted by the minimal SU{sub L}(3)xU{sub X}(1) model, which have unusual couplings to the standard model (SM) gauge bosons. A gauge-fixing procedure covariant under the SU{sub L}(2)xU{sub Y}(1) group was introduced for these new gauge bosons (dubbed bileptons) in order to generate gauge-invariant Green functions. The similarities between this procedure and the unconventional quantization scheme of the background field method are discussed. It is found that, for relatively light bileptons, with a mass ranging from 2m{sub W} to 6m{sub W}, the radiative corrections tomore » the form factors associated with the WWV vertex can be of the same order of magnitude than the SM one. In the case of heavier bileptons, their contribution is smaller by about one and 2 orders of magnitude than their SM counterpart.« less
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  • We construct a full left-right model for the electroweak interactions based on the SU(3){sub L} x SU(3){sub R} x U(1){sub X} gauge symmetry. The fermion content of the model is such that anomaly cancellation restricts the number of families to be a multiple of three. One of the most important features of the model is the joint presence of three light active neutrinos, three additional neutrinos at keV mass scale, and six heavy ones with masses around 10{sup 11} GeV. They form a well-motivated part of the spectrum in the sense that they address challenging problems related to neutrino oscillation,more » warm dark matter, and baryogenesis through leptogenesis.« less
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