${{\boldsymbol \mu}}$ DECAY PARAMETERS
($\mathit V−\mathit A$) theory predicts $\eta $ = 0.
$\bf{
0.057 \pm0.034}$
|
OUR AVERAGE
|
$0.071$ $\pm0.037$ $\pm0.005$ |
30M |
|
|
CNTR |
+ |
$0.011$ $\pm0.081$ $\pm0.026$ |
5.3M |
1 |
|
CNTR |
+ |
$-0.12$ $\pm0.21$ |
6346 |
|
|
HBC |
+ |
• • • We do not use the following data for averages, fits, limits, etc. • • • |
$-0.0021$ $\pm0.0070$ $\pm0.0010$ |
30M |
2 |
|
CNTR |
+ |
$-0.012$ $\pm0.015$ $\pm0.003$ |
5.3M |
2 |
|
CNTR |
+ |
$-0.007$ $\pm0.013$ |
5.3M |
3 |
|
FIT |
+ |
$-0.7$ $\pm0.5$ |
170k |
4 |
|
ASPK |
+ |
$-0.7$ $\pm0.6$ |
280k |
4 |
|
ASPK |
+ |
$0.05$ $\pm0.5$ |
800k |
4 |
|
ASPK |
+ |
$-2.0$ $\pm0.9$ |
9213 |
5 |
|
HBC |
+ |
1
Previously we used the global fit result from BURKARD 1985B in OUR AVERAGE, we now only include their actual measurement.
|
2
$\alpha $ = $\alpha {{}^\prime}$ = 0 assumed.
|
3
Global fit to all measured parameters. The fit correlation coefficients are given in BURKARD 1985B.
|
4
${{\mathit \rho}}$ constrained = 0.75.
|
5
Two parameter fit to ${{\mathit \rho}}$ and ${{\mathit \eta}}$; PLANO 1960 discounts value for ${{\mathit \eta}}$.
|
|
References: |
| PRL 94 021802 |
Muon Decay: Measurement of the Transverse Polarization of the Decay Positrons and its Implications for the Fermi Coupling Constant and Time Reversal Invariance |
| PL 160B 343 |
Muon Decay: Measurement of the Transverse Positron Polarization and General Analysis |
| PR 181 1854 |
Measurement of the Low Energy End of the ${{\mathit \mu}^{+}}$ Decay Spectrum |
| PR 166 1379 |
Measurement of the Muon Decay Spectrum with a Wire Spark Chamber Spectrometer |
| PR 156 1475 |
Measurement of the Muon Decay Spectrum with a Wire Spark Chamber Spectrometer |
| Nevis 147 unpub. |
Positron Spectrum from Muon Decay. |
| PR 119 1400 |
Momentum and Asymmetry Spectrum of ${{\mathit \mu}}$ Meson Decay |
|