Author/Authors :
M. Bissegger، نويسنده , , M. and Fuhrer، نويسنده , , A. and Gasser، نويسنده , , J. and Kubis، نويسنده , , B. and Rusetsky، نويسنده , , A.، نويسنده ,
Abstract :
The pronounced cusp in K → 3 π decays which is generated by the pion mass difference is directly related to the π π S -wave scattering lengths. We apply a nonrelativistic effective field theory framework to evaluate the amplitudes for K L → 3 π decays in a systematic manner. Electromagnetic effects in the neutral channel K L → 3 π 0 are also discussed.
Keywords :
Chiral symmetries , Decays of K -mesons , Meson–meson interactions , Analytic properties of the S -matrix
