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$\mathit T$ VIOLATION TESTS IN ${{\mathit K}^{+}}$ AND ${{\mathit K}^{-}}$ DECAYS

Im($\xi $) in ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}$ DECAY (from transverse ${{\mathit \mu}}$ pol.)

INSPIRE   PDGID:

S010IXI

Test of $\mathit T$ reversal invariance.

VALUE EVTS DOCUMENT ID TECN CHG  COMMENT $\bf{ -0.006 \pm0.008}$ OUR AVERAGE $-0.0053$ $\pm0.0071$ $\pm0.0036$ 1 ABE 2004 F K246 + $-0.016$ $\pm0.025$ 20M CAMPBELL 1981 CNTR + Pol. • • We do not use the following data for averages, fits, limits, etc. • • $-0.013$ $\pm0.016$ $\pm0.003$ 3.9M ABE 1999 S CNTR + $p_T$ ${{\mathit K}^{+}}$ at rest 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 Im($\xi $) $<$ 0.016 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 CAMPBELL 1981 PRL 47 1032 Limits on $\mathit CP$ Invariance Violation in ${{\mathit K}}{}^{+}_{{{\mathit \mu}}3}$ Decays Also PR D27 1056 Search for $\mathit T$ Invariance Violation in ${{\mathit K}_{{\mu3}}^{+}}$ Decay

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