High precision study of CP-violating charge asymmetry in K+- --> 3pi+- decays

Details High precision study of CP-violating charge asymmetry in K+- --> 3pi+- decays High precision study of CP-violating charge asymmetry in K+- --> 3pi+- decays

2006-04-02

arxiv.org/abs/hep-ex/0604002v1

Physics

High Energy Physics

High Energy Physics - Experiment

A talk given at "Les Rencontres de Physique de la Vallee d'Aoste 2006", La Thuile, March 2006. 14 pages, 2 figures

Scientific paper

A precise measurement of the direct CP violating charge asymmetry parameter $A_g$ in $K^\pm\to\pi^\pm\pi^+\pi^-$ decays by the NA48/2 experiment at CERN SPS is presented. The experiment has been designed not to be limited by systematic uncertainties in the asymmetry measurement. A preliminary result for the charge asymmetry $A_g=(-1.3\pm2.3)\times 10^{-4}$ has been obtained with a sample of $3.11\times 10^9$ selected events corresponding to the full collected statistics. The precision of the result is limited by the statistics used.

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