First observation and study of the $K^{\pm }\to \ddot{I}{€}^0\ddot{I}{€}^0\hat{I}{¼}^{\pm }\hat{I}½$ decay

2 Collaboration, J. R. Batley, G. Kalmus +121

The NA48/2 experiment at CERN reports the first observation of the $K^{\pm }\to \ddot{I}{€}^0\ddot{I}{€}^0\hat{I}{¼}^{\pm }\hat{I}½$ decay based on a sample of 2437 candidates with 15% background co…