2006/11/30 by J. Hernández-Sánchez, J. Hernandez-Sanchez, C. G. Honorato +3 · 1 citation
Chemistry · Physics and Astronomy · #Atomic physics #Chemistry #Coupling (piping) #Crystallography #Dark Matter and Cosmic Phenomena #Materials science #Particle physics #Particle physics theoretical and experimental studies #Physics #Quadrupole #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.75.073017
published as Phys.Rev.D75:073017,2007 · This paper has been merged with hep-ph/0612171 for publication in Physical Review D
arxiv created 2007/03/26 · openalex publication_date 2007/04/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In the framework of the electroweak chiral Lagrangian, the one-loop induced effects of the anomalous tbW coupling, which includes both left- and right-handed complex components, on the static electromagnetic properties of the W boson and the t quark are studied. The attention is focused mainly on the CP-violating electromagnetic properties. It is found that the tbW anomalous coupling can induce both CP-violating moments of the W boson, namely, its electric dipole (\stackrel\texttildelow\ensuremathμW) and magnetic quadrupole (\stackrel\texttildelowQW) moments. As far as the t quark is concerned, a potentially large electric dipole moment (dt) can arise due to the anomalous tbW coupling. The most recent bounds on the tbW coupling left- and right-handed parameters from B meson physics lead to the following estimates \stackrel\texttildelow\ensuremathμW\ensuremath∼4\ifmmode×\else\texttimes\fi10^\ensuremath-23\ensuremath-4\ifmmode×\else\texttimes\fi10^\ensuremath-22 e\ifmmode⋅\else\textperiodcentered\ficm and \stackrel\texttildelowQW\ensuremath∼10^\ensuremath-38\ensuremath-10^\ensuremath-37 e\ifmmode⋅\else\textperiodcentered\ficm2, which are 7 and 14 orders of magnitude larger than the standard model (SM) predictions, whereas dt may be as large as 10^\ensuremath-22 e\ifmmode⋅\else\textperiodcentered\ficm, which is about 8 orders of magnitude larger than its SM counterpart.