Measurement of P_{mu}xi in Polarized Muon Decay

Details Measurement of P_{mu}xi in Polarized Muon Decay Measurement of P_{mu}xi in Polarized Muon Decay

2006-05-23

arxiv.org/abs/hep-ex/0605100v3

Phys. Rev. D 74, 072007 (2006)

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages, 7 figures, Phys. Rev. D 74, 072007 (2006) Final version

Scientific paper

10.1103/PhysRevD.74.072007

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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