New search for T-violation in the decays of the charged kaon

TL;DR

This paper reports on a search for T-violation in charged kaon decays, finding no evidence of T-violation within the experimental sensitivity, based on data collected over four years.

Contribution

First measurement of T-violating muon polarization in specific charged kaon decays using the KEK E246 experiment.

Findings

Results are consistent with no T-violation.

Data collected from 1996 to 2000.

Provides upper limits on T-violating effects in these decays.

Abstract

We report the results of the measurement of T-violating transverse muon polarization in the decays K^+ --> pi^0 mu^+ nu and K^+ --> mu^+ nu gamma performed in the experiment E246 at KEK. Preliminary results obtained for the entire data set taken in the period 1996-2000 are consistent with no T-violation in both decays.