# Measurement of P(mu)xi in polarized muon decay

@article{Jamieson2006MeasurementOP, title={Measurement of P(mu)xi in polarized muon decay}, author={T. C. B. Jamieson and R. Bayes and Y. Davydov and P. Depommier and J. Doornbos and W. Faszer and M. Fujiwara and C. Gagliardi and A. Gaponenko and D. Gill and P. Gumplinger and M. Hasinoff and R. Henderson and J. Hu and P. Kitching and D. Koetke and J. A. Macdonald and R. Macdonald and G. Marshall and E. Mathie and R. Mischke and J. R. Musser and M. Nozar and K. Olchanski and A. Olin and R. Openshaw and T. A. Porcelli and J. -M. Poutissou and R. Poutissou and M. Quraan and N. Rodning and V. Selivanov and G. Sheffer and B. Shin and T. Stanislaus and R. Tacik and V. Torokhov and R. Tribble and M. Vasiliev}, journal={Physical Review D}, year={2006}, volume={74}, pages={072007} }

The quantity P_{mu}^{pi}xi, where xi is one of the muon decay parameters and $P_{\mu}^{\pi}$ is the degree of muon polarization in pion decay, has been measured. The value P_{mu}^{pi}xi = 1.0003 +- 0.0006 stat. +- 0.0038 syst. was obtained. This result agrees with previous measurements but is over a factor of two more precise. It also agrees with the Standard Model prediction for P_{mu}^{pi}xi and thus leads to restrictions on left-right symmetric models.

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