${{\boldsymbol \mu}}$ DECAY PARAMETERS

TRANSVERSE ${{\boldsymbol e}^{+}}$ POLARIZATION NORMAL TO PLANE OF ${{\boldsymbol \mu}}$ SPIN, ${{\boldsymbol e}^{+}}$ MOMENTUM INSPIRE search

Zero if $\mathit T$ invariance holds.
VALUE ($ 10^{-3} $) EVTS DOCUMENT ID TECN CHG  COMMENT
$\bf{ -2 \pm8}$ OUR AVERAGE
$-3.7$ $\pm7.7$ $\pm3.4$ 30M
DANNEBERG
2005
CNTR + $7 - 53$ MeV ${{\mathit e}^{+}}$
$7$ $\pm22$ $\pm7$ 5.3M
BURKARD
1985B
CNTR + Annihil 9$-$53 MeV
  Conservation Laws:
TIME REVERSAL ($\mathit T$) INVARIANCE
  References:
DANNEBERG 2005
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
BURKARD 1985B
PL 160B 343 Muon Decay: Measurement of the Transverse Positron Polarization and General Analysis