A new limit of T-violating transverse muon polarization in the $K^{+}\to {\pi }^0{\mu }^{+}\nu$ decay

Abstract

A search for T-violating transverse muon polarization ($P_T$) in the $K^{+}\to {\pi }^0{\mu }^{+}\nu$ decay was performed using kaon decays at rest. A new improved value, $P_T=-0.0017\pm 0.0023(stat)\pm 0.0011(syst)$, was obtained giving an upper limit, $|P_T|<0.0050$. The T-violation parameter was determined to be Im$\xi =-0.0053\pm 0.0071(stat)\pm 0.0036(syst)$ giving an upper limit, $|$Im$\xi |<0.016$.

5 pages, 4 figures

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