We report here the first observation by the NA48/2 experiment of the rare decay K± → π±π0e+e-. From a sample of about 2000 decay candidates collected in 2003, a preliminary value of the branching ratio in the full kinematic space has been obtained as (4.06 ± 0.17) · 10-6.
First observation of K± → π±π0e+e- decay at NA48
COLLAZUOL, GIANMARIA;COSTANTINI, FLAVIO;GIUDICI, SERGIO;LAMANNA, GIANLUCA;PIERAZZINI, GIUSEPPE;RUGGIERO, GIUSEPPE;SOZZI, MARCO STANISLAO;VENDITTI, STEFANO;
2015-01-01
Abstract
We report here the first observation by the NA48/2 experiment of the rare decay K± → π±π0e+e-. From a sample of about 2000 decay candidates collected in 2003, a preliminary value of the branching ratio in the full kinematic space has been obtained as (4.06 ± 0.17) · 10-6.File in questo prodotto:
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