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

2002-10-15

arxiv.org/abs/hep-ex/0210035v1

eConfC0209101:TU10,2002; Nucl.Phys.Proc.Suppl.123:74-81,2003

Physics

High Energy Physics

High Energy Physics - Experiment

Invited talk at the Seventh International Workshop on Tau Lepton Physics (TAU02), Santa Cruz, Ca, USA, Sept 2002, 8 pages, LaT

Scientific paper

10.1016/S0920-5632(03)80309-2

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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