Result of T-violating muon polarization measurement in the K⁺ → π⁰ μ⁺ ν decay

2004/06/09 by J. Imazato, Imazato, J.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0406025

10 pages, 4 figures, XXXIXth Rencontres de Moriond, Electroweak Interactions and Unified Theories, La Thuile, Italy, March 21-28, 2004

arxiv created 2004/06/09 · arxiv updated 2009/12/01

Abstract

A search for T-violating muon polarization in the K⁺ → π⁰ μ⁺ν decay has been performed at KEK using stopped kaons. A new improved limit was obtained, P_T= -0.0017 ± 0.0023 (stat) ± 0.0011 (syst), corresponding to a 90 % confidence limit of | P_T| < 0.0050. The T-violating parameter was also determined to be Imξ= -0.0053 ± 0.0071 (stat) ± 0.0036 (syst), and |rm Imξ| < 0.016 (90 % CL).

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