One--loop induced electric dipole and magnetic quadrupole moments of the $W$ gauge boson via the anomalous tbW vertex

The effects of the anomalous tbW vertex on the one-loop induced electric dipole ($\tilde{\mu}_W$) and magnetic quadrupole ($\tilde{Q}_W$) moments of the W gauge boson is studied in a Higgsless scenario. In the frame of the electroweak chiral Lagrangian approach, the most general $tbW$ coupling with both left- and right-handed components is used to estimate the CP-violating moments of the W boson. Current experimental data allow one to find the following estimates for the tbW contribution: $\tilde{\mu}_W ~ 10^{-23}-10^{-22} e-cm$ and $\tilde{Q}_W ~ 10^{-38}-10^{-37} e-cm^2$, which are 7 and 14 orders of magnitude larger than the standard model predictions