W-boson unitarity effects and oscillations in the neutral Kaon system

We study the effects on oscillations in the neutral-Kaon system from lepton and hadron self-energy loops in the W-boson propagators. The corresponding W box diagrams are evaluated by attaching the external quark lines to covariant vertex functions for the composite Kaons, integrating over all off-sh...

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Bibliographic Details
Published in:arXiv.org 2003-08
Main Authors: Eef van Beveren, Rupp, George
Format: Article
Language:English
Subjects:
Kaons
Leptons
Oscillations
Online Access:Get full text
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Summary:We study the effects on oscillations in the neutral-Kaon system from lepton and hadron self-energy loops in the W-boson propagators. The corresponding W box diagrams are evaluated by attaching the external quark lines to covariant vertex functions for the composite Kaons, integrating over all off-shell momenta. We find that the ratio of the imaginary and real parts of the amplitude is of the same size as with the experimental value of the modulus of the CP-violating parameter epsilon.
ISSN:2331-8422