High precision study of K+- --> 3pi+- decays by NA48/2

Abstract

Preliminary results of study of $K^{\pm }\to 3{\pi }^{\pm }$ decays by the NA48/2 experiment at CERN SPS are presented. They include a precise measurement of the direct CP violating charge asymmetry of Dalitz plot linear slope parameters $A_g=(g^{+}-g^{-})/(g^{+}+g^{-})$, and a measurement of the Dalitz plot slope parameters $(g,h,k)$ themselves. Due to the design of the experiment, and a large data set collected, unprecedented precisions were achieved.

arXiv commentA talk given at "Crimea-2006", Yalta, September 2006. 10 pages, 2 figures