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arXiv · hep-ex/0210035

Search for the Electric Dipole Moment of the tau lepton

K. Inami·Belle collaboration
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Abstract

We have searched for a T/CP violation signature arising from an electric dipole form factor (d_tau) of the tau lepton in the e+e- -> tau+tau- reaction. Using an optimal observable method for 29.5 fb^{-1} of data collected with the Belle detector at the KEKB collider at sqrt{s}=10.58 GeV, we obtained the preliminary result Re(d_tau) = (1.15 +- 1.70) x 10^{-17} ecm and Im(d_tau) = (-0.83 +- 0.86) x 10^{-17} ecm for the real and imaginary parts of d_tau, respectively, 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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K. Inami, Belle collaboration. 2002-10-15. Search for the Electric Dipole Moment of the tau lepton. https://doi.org/10.1016/s0920-5632(03)80309-2

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