Searches for direct CP violation in K_L —> π⁰ e⁺e^-: new motivations from NA48KS

by Giancarlo d'Ambrosio (INFN, Sezione di Napoli)

Friday 4 Jul 2003, 14:00 → 15:00 Europe/Zurich

TH Auditorium (CERN)

The new measurement of K_S —> π⁰ e⁺e^- by NA48 has reopened the possibility to measure the direct CP violation in K_L —> π⁰ e⁺e^- by interfering with the CP-conserving K_S —> π⁰ e⁺e^-. In fact, the observed value of K_S —> π⁰ e⁺e^- favours strongly this effect. We motivate the searches for rare kaon decays and show the relevance of further searches in K_L -> π⁰ e⁺e^-. We recall and update also the auxiliary channel K_L —> π⁰ γγ.