Electric dipole and magnetic quadrupole moments of the W boson via a CPviolating HWW vertex in effective Lagrangians
Abstract
The possibility of nonnegligible W electric dipole ({mu}tilde{sub W}) and magnetic quadrupole (Qtilde{sub W}) moments induced by the most general HWW vertex is examined via the effective Lagrangian technique. It is assumed that new heavy fermions induce an anomalous CPodd component of the HWW vertex, which can be parametrized by an SU{sub L}(2)xU{sub Y}(1)invariant dimensionsix operator. This anomalous contribution, when combined with the standard model CPeven contribution, leads to CPodd electromagnetic properties of the W boson, which are characterized by the form factors {delta}{kappa}tilde and {delta}Qtilde. It is found that {delta}{kappa}tilde is divergent, whereas {delta}Qtilde is finite, which reflects the fact that the latter cannot be generated at the oneloop level in any renormalizable theory. Assuming reasonable values for the unknown parameters, we found that {mu}tilde{sub W}{approx}36x10{sup 21} e{center_dot}cm, which is 8 orders of magnitude larger than the SM prediction and close to the upper bound derived from the neutron electric dipole moment. The estimated size of the somewhat lessstudied Qtilde{sub W} moment is of the order of 10{sup 36} e{center_dot}cm{sup 2}, which is 15 orders of magnitude above the SM contribution.
 Authors:
 Departamento de Matematicas y Fisica, Universidad Autonoma de Aguascalientes, Avenida Universidad 940, C.P. 20100, Aguascalientes, Aguascalientes (Mexico)
 (Mexico)
 Publication Date:
 OSTI Identifier:
 20774463
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physical Review. D, Particles Fields; Journal Volume: 72; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.72.115009; (c) 2005 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; CP INVARIANCE; ELECTRIC DIPOLE MOMENTS; ELECTRIC DIPOLES; ELECTROMAGNETIC FORM FACTORS; LAGRANGIAN FIELD THEORY; LAGRANGIAN FUNCTION; MAGNETIC MOMENTS; NEUTRONS; QUADRUPOLE MOMENTS; QUADRUPOLES; RENORMALIZATION; STANDARD MODEL; SU2 GROUPS; U1 GROUPS; UNITARY SYMMETRY; W MINUS BOSONS; W PLUS BOSONS
Citation Formats
Montano, J., RamirezZavaleta, F., TavaresVelasco, G., Toscano, J.J., Departamento de Fisica, CINVESTAV, Apartado Postal 14740, 07000, Mexico, D.F., and Facultad de Ciencias Fisico Matematicas, Benemerita Universidad Autonoma de Puebla, Apartado Postal 1152, Puebla, Puebla. Electric dipole and magnetic quadrupole moments of the W boson via a CPviolating HWW vertex in effective Lagrangians. United States: N. p., 2005.
Web. doi:10.1103/PhysRevD.72.115009.
Montano, J., RamirezZavaleta, F., TavaresVelasco, G., Toscano, J.J., Departamento de Fisica, CINVESTAV, Apartado Postal 14740, 07000, Mexico, D.F., & Facultad de Ciencias Fisico Matematicas, Benemerita Universidad Autonoma de Puebla, Apartado Postal 1152, Puebla, Puebla. Electric dipole and magnetic quadrupole moments of the W boson via a CPviolating HWW vertex in effective Lagrangians. United States. doi:10.1103/PhysRevD.72.115009.
Montano, J., RamirezZavaleta, F., TavaresVelasco, G., Toscano, J.J., Departamento de Fisica, CINVESTAV, Apartado Postal 14740, 07000, Mexico, D.F., and Facultad de Ciencias Fisico Matematicas, Benemerita Universidad Autonoma de Puebla, Apartado Postal 1152, Puebla, Puebla. Thu .
"Electric dipole and magnetic quadrupole moments of the W boson via a CPviolating HWW vertex in effective Lagrangians". United States.
doi:10.1103/PhysRevD.72.115009.
@article{osti_20774463,
title = {Electric dipole and magnetic quadrupole moments of the W boson via a CPviolating HWW vertex in effective Lagrangians},
author = {Montano, J. and RamirezZavaleta, F. and TavaresVelasco, G. and Toscano, J.J. and Departamento de Fisica, CINVESTAV, Apartado Postal 14740, 07000, Mexico, D.F. and Facultad de Ciencias Fisico Matematicas, Benemerita Universidad Autonoma de Puebla, Apartado Postal 1152, Puebla, Puebla},
abstractNote = {The possibility of nonnegligible W electric dipole ({mu}tilde{sub W}) and magnetic quadrupole (Qtilde{sub W}) moments induced by the most general HWW vertex is examined via the effective Lagrangian technique. It is assumed that new heavy fermions induce an anomalous CPodd component of the HWW vertex, which can be parametrized by an SU{sub L}(2)xU{sub Y}(1)invariant dimensionsix operator. This anomalous contribution, when combined with the standard model CPeven contribution, leads to CPodd electromagnetic properties of the W boson, which are characterized by the form factors {delta}{kappa}tilde and {delta}Qtilde. It is found that {delta}{kappa}tilde is divergent, whereas {delta}Qtilde is finite, which reflects the fact that the latter cannot be generated at the oneloop level in any renormalizable theory. Assuming reasonable values for the unknown parameters, we found that {mu}tilde{sub W}{approx}36x10{sup 21} e{center_dot}cm, which is 8 orders of magnitude larger than the SM prediction and close to the upper bound derived from the neutron electric dipole moment. The estimated size of the somewhat lessstudied Qtilde{sub W} moment is of the order of 10{sup 36} e{center_dot}cm{sup 2}, which is 15 orders of magnitude above the SM contribution.},
doi = {10.1103/PhysRevD.72.115009},
journal = {Physical Review. D, Particles Fields},
number = 11,
volume = 72,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2005},
month = {Thu Dec 01 00:00:00 EST 2005}
}

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