Some Remarks on the Search for CP Violation in Z-Decays

Details Some Remarks on the Search for CP Violation in Z-Decays Some Remarks on the Search for CP Violation in Z-Decays

1996-03-18

arxiv.org/abs/hep-ph/9603331v1

Z.Phys. C73 (1997) 647-652

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages LaTeX and 2 Postscript files

Scientific paper

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.

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