Search for the Electric Dipole Moment of the tau Lepton

Details Search for the Electric Dipole Moment of the tau Lepton Search for the Electric Dipole Moment of the tau Lepton

2002-10-31

arxiv.org/abs/hep-ex/0210066v3

Phys.Lett.B551:16-26,2003

Physics

High Energy Physics

High Energy Physics - Experiment

15 pages, LaTeX, 21 figures, submitted to Phys. Lett. B

Scientific paper

10.1016/S0370-2693(02)02984-2

We have searched for a CP violation signature arising from an electric dipole moment (d_tau) of the tau lepton in the e+e- -> tau+tau- reaction. Using an optimal observable method and 29.5 fb^{-1} of data collected with the Belle detector at the KEKB collider at sqrt{s} = 10.58 GeV, we find Re(d_tau) = (1.15 +- 1.70) x 10^{-17} ecm and Im(d_tau) = (-0.83 +- 0.86) x 10^{-17} ecm and set the 95% confidence level limits -2.2 < Re(d_tau) < 4.5 (10^{-17}ecm) and -2.5 < Im(d_tau) < 0.8 (10^{-17}ecm).

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