¹ AOKI 1994 measures $\xi \mathit P_{\mu }$ =$-0.9996$ $\pm0.0030$ $\pm0.0048$. The above limit is obtained by summing the statistical and systematic errors in quadrature, normalizing to the physically significant region ($\vert \xi \mathit P_{\mu }\vert <1$) and assuming that $\xi $=1, its maximum value.

² Assumes $\xi $=1.

References:

AOKI

1994

PR D50 69

Search for Right-Handed Currents in the Decay Chain of ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}$ , ${{\mathit \mu}^{+}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit \nu}_{{e}}}{{\overline{\mathit \nu}}_{{\mu}}}$

IMAZATO

1992

PRL 69 877

Search for Right Handed Currents in the Decay Chain ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}}$ , ${{\mathit \mu}^{+}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit \nu}}{{\overline{\mathit \nu}}}$

YAMANAKA

1986

PR D34 85

Search for Right-Handed Currents in the Decay ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}$

CUTTS

1969

PR 184 1380

Measurement of the Muon Polarization Vector in ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}}$

COOMBES

1957

PR 108 1348

Polarization of ${{\mathit \mu}^{+}}$ Mesons from the Decay of ${{\mathit K}^{+}}$ Mesons