Some Remarks on the Search for CP Violation in Z-Decays
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
We discuss some issues arising in the search for CP violation in the decays Z -> tau+ tau- and Z -> b \bar b X. The form-factor and the effective Lagrangian approach to parametrize CP-violating effects are compared. We emphasize the interest to study both real and imaginary parts of CP-violating form factors like the weak dipole moment form factor d_tau^Z(m^2_Z) of the tau-lepton. We propose an 'optimal' way to search for CP violation when Z -> b \bar b X events have to be selected on a statistical basis from the total number of Z hadronic decays.
Cite
@article{arxiv.hep-ph/9603331,
title = {Some Remarks on the Search for CP Violation in Z-Decays},
author = {W. Bernreuther and O. Nachtmann},
journal= {arXiv preprint arXiv:hep-ph/9603331},
year = {2007}
}
Comments
12 pages LaTeX and 2 Postscript files