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We present preliminary results of a partial-wave analysis of ^-^-^-^+_ using data from the Belle experiment at the KEKB e^+e^- collider. We validate our analysis with a model-independent one. We see an a₁ (1420) resonance and a G-parity violating 1^- (782) P] wave in tauon decays. Our results will improve models used in simulation studies necessary for measuring the tauon electric and magnetic dipole moments and Michel parameters.
Rabusov et al. (Wed,) studied this question.