#### $\mathit P_{T}$ in ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}$

T-violating muon polarization. Sensitive to new sources of $\mathit CP$ violation beyond the Standard Model.
VALUE ($10^{-3}$) EVTS DOCUMENT ID TECN CHG
$-1.7$ $\pm2.3$ $\pm1.1$ 1
 2004 F
K246 +
• • We do not use the following data for averages, fits, limits, etc. • •
$-4.2$ $\pm4.9$ $\pm0.9$ 3.9M
 1999 S
K246 +
 1 Includes three sets of data: 96-97 (ABE 1999S), 98, and 99-00 totaling about three times the ABE 1999S data sample. Corresponds to P$_{T}$ $<$ $5.0 \times 10^{-3}$ at 90$\%$ CL.
Conservation Laws:
TIME REVERSAL ($\mathit T$) INVARIANCE
References:
 ABE 2004F
PRL 93 131601 A New Limit of $\mathit T$-Violating Transverse Muon Polarization in the ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}}$ Decay
 Also
PR D73 072005 Search for $\mathit T$-Violating Transverse Muon Polarization in the ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}}$ Decay
 ABE 1999S
PRL 83 4253 Search for $\mathit T$-Violating Transverse Muon Polarization in ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}}$ Decay using Stopped Kaons