Recent Results from NA48/2 Experiment at CERN-SPS

摘要

Preliminary results of the measurement of charged CP violating asymmetry Ag = (g~+-g~-)/(g~+-g~-)in both 3 decay modes, based on the whole accumulated statistics in 2003 and 2004, are presented.A new unexpected anomaly in the 20 mass subsystem spectrum in K± →π~±π~0π~0 decay, so called “cusp”, due to charge exchange re-scattering process (π+π~-→π~0π~0) is discussed.A preliminary result indicates the observation of direct emission amplitude and first observation of an interference term in the non-leptonic radiative rare decay K± →π~±π~0γ is presented.