Bilepton effects on the WWV* vertex in the 331 model with righthanded neutrinos via a SU{sub L}(2)xU{sub Y}(1) covariant quantization scheme
Abstract
In a recent paper [J. Montano, F. RamirezZavaleta, G. TavaresVelasco, 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 offshell vertex WWV* (V={gamma}, Z) using a SU{sub L}(2)xU{sub Y}(1) covariant gaugefixing term for the bileptons. We proceed along the same lines and calculate the effects of the gauge bosons predicted by the 331 model with righthanded 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:
 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; SU2 GROUPS; U1 GROUPS; W MINUS BOSONS; W PLUS BOSONS; Z NEUTRAL BOSONS
Citation Formats
RamirezZavaleta, F., TavaresVelasco, G., and Toscano, J. J. Bilepton effects on the WWV* vertex in the 331 model with righthanded 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.
RamirezZavaleta, F., TavaresVelasco, G., & Toscano, J. J. Bilepton effects on the WWV* vertex in the 331 model with righthanded neutrinos via a SU{sub L}(2)xU{sub Y}(1) covariant quantization scheme. United States. doi:10.1103/PHYSREVD.75.075008.
RamirezZavaleta, F., TavaresVelasco, G., and Toscano, J. J. Sun .
"Bilepton effects on the WWV* vertex in the 331 model with righthanded 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 righthanded neutrinos via a SU{sub L}(2)xU{sub Y}(1) covariant quantization scheme},
author = {RamirezZavaleta, F. and TavaresVelasco, G. and Toscano, J. J.},
abstractNote = {In a recent paper [J. Montano, F. RamirezZavaleta, G. TavaresVelasco, 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 offshell vertex WWV* (V={gamma}, Z) using a SU{sub L}(2)xU{sub Y}(1) covariant gaugefixing term for the bileptons. We proceed along the same lines and calculate the effects of the gauge bosons predicted by the 331 model with righthanded 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 oneloop 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 gaugefixing 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 gaugeinvariant 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 »

Interesting radiative patterns of neutrino mass in an SU(3){sub C}xSU(3){sub L}xU(1){sub X} model with righthanded neutrinos
We investigate a simple model of neutrino mass based on SU(3){sub C}xSU(3){sub L}xU(1){sub X} gauge unification. The Yukawa coupling of the model has automatic leptonnumber symmetry which is broken only by the selfcouplings of the Higgs boson. At tree level, the neutrino spectrum contains three Dirac fermions, one massless and two degenerate in mass. At the twoloop level, neutrinos obtain Majorana masses and correct the treelevel result which naturally gives rise to an inverted hierarchy mass pattern and interesting mixing which can fit the current data with minor finetuning. In another scenario, one can pick the scales such that themore » 
Static quantities of a neutral bilepton in the 331 model with righthanded neutrinos
A neutral vector boson can possess static electromagnetic properties provided that the associated field is nonselfconjugate. This possibility is explored in the SU{sub C}(3)xSU{sub L}(3)xU{sub N}(1) model with righthanded neutrinos, which predicts a complex neutral gauge boson Y{sup 0} in a nontrivial representation of the electroweak group. In this model the only nonvanishing form factors are the CPeven ones, which arise from both the quark and gauge sectors, and contribute to the magnetic dipole and the electric quadrupole moments of this neutral particle. 
Leftright SU(3){sub L}xSU(3){sub R}xU(1){sub X} model with light, keV, and heavy neutrinos
We construct a full leftright 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 wellmotivated part of the spectrum in the sense that they address challenging problems related to neutrino oscillation,more » 
Semidirect product gauge group [SU(3){sub c}xSU(2){sub L}]xU(1){sub Y} and quantization of hypercharge
In the standard model the hypercharges of quarks and leptons are not determined by the gauge group SU(3){sub c}xSU(2){sub L}xU(1){sub Y} alone. We show that, if we choose the semidirect product group [SU(3){sub c}xSU(2){sub L}]xU(1){sub Y} as its gauge group, the hyperchages are settled to be n/6 mod Z(n=0,1,3,4). In addition, the conditions for gaugeanomaly cancellation give strong constraints. As a result, the ratios of the hypercharges are uniquely determined and the gravitational anomaly is automatically canceled. The standard charge assignment to quarks and leptons can be properly reproduced. For exotic matter fields their hypercharges are also discussed.