Search for CP violation in τ±→KS0π±ντ decays at Belle
Abstract
We report on a search for CP violation in τ±→KS0π±ντ decays using a data sample of 699 fb-1 collected in the Belle experiment at the KEKB electron-positron asymmetric-energy collider. The CP asymmetry is measured in four bins of the invariant mass of the KS0π± system and found to be compatible with zero with a precision of O(10-3) in each mass bin. Limits for the CP violation parameter ℑ(ηS) are given at a 90% confidence level. These limits are |ℑ(ηS)|<0.026 or better, depending on the parameterization used to describe the hadronic form factors and improve upon previous limits by one order of magnitude.
- Publication:
-
Nuclear Physics B Proceedings Supplements
- Pub Date:
- April 2012
- DOI:
- 10.1016/j.nuclphysbps.2012.02.037
- Bibcode:
- 2012NuPhS.225..173H