Measurement of P_{mu}xi in Polarized Muon Decay

Abstract

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.

arXiv comment11 pages, 7 figures, Phys. Rev. D 74, 072007 (2006) Final version

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• Measurement of the Michel Parameter $\rho$ in Muon Decay
• Measurement of the Muon Decay Parameter delta
• Muon Decay Spectrum: Leading Logarithmic Approximation
• Global analysis of muon decay measurements
• Higher order QED corrections to muon decay spectrum
• First Order Radiative Corrections to Polarized Muon Decay Spectrum
• Precision planar drift chambers and cradle for the TWIST muon decay spectrometer
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Cited by in corpus (13)

• Physics at a future Neutrino Factory and super-beam facility
• Lepton Flavor Violation in the Standard Model with general Dimension-Six Operators
• Supersymmetric Contributions to Weak Decay Correlation Coefficients
• Precise measurement of parity violation in polarized muon decay
• A Precision Measurement of the Muon Decay Parameters $\rho$ and $\delta$
• Decay of negative muons bound in ${}^{27}$Al
• Question of Lorentz invariance in muon decay
• Longitudinal muon spin relaxation in high purity aluminum and silver
• Calibration of the TWIST high-precision drift chambers
• Muon Physics: A Pillar of the Standard Model
• Extracting the CP-violating phases of trilinear R-parity violating couplings from $\mu \to eee$
• TWIST: Precision Measurement of the Muon Decay Parameters
• Future Directions in Parity Violation: From Quarks to the Cosmos