The NA48/2 Collaboration at CERN has accumulated and analysed unprecedented statistics of rare kaon decays in the Ke4 modes: Ke4(+-) (K± p+p-e±) and Ke4(00) (K± p0p0e±) with nearly one percent background contamination. It leads to the improved measurement of branching fractions and detailed form factor studies. New final results from the analysis of 381 K± p± rare decay candidates collected by the NA48/2 and NA62 experiments at CERN are presented. The results include a decay rate measurement and fits to Chiral Perturbation Theory (ChPT) description.
Recent NA48/2 and NA62 results / Madigozhin D., Ambrosino F., Antonelli A., Anzivino G., Arcidiacono R., Baldini W., Balev S., Batley J.R., Behler M., Bifani S., Biino C., Bizzeti A., Bloch-Devaux B., Bocquet G., Bolotov V., Bucci F., Cabibbo N., Calvetti M., Cartiglia N., Ceccucci A., et al.. - ELETTRONICO. - (2014), pp. 369-372. (49th Rencontres de Moriond on QCD and High Energy Interactions 2017 Aosta Valley, ita 2014).
Recent NA48/2 and NA62 results
Bizzeti A.
;Bucci F.
;Calvetti M.
;Cerri C.;Collazuol G.;D'Agostini G.;Fantechi R.;Iacopini E.
;Lenti M.
;Leonardi E.;Mannelli I.;Peters A.;Raggi M.;Ruggiero G.
;Sergi A.;
2014
Abstract
The NA48/2 Collaboration at CERN has accumulated and analysed unprecedented statistics of rare kaon decays in the Ke4 modes: Ke4(+-) (K± p+p-e±) and Ke4(00) (K± p0p0e±) with nearly one percent background contamination. It leads to the improved measurement of branching fractions and detailed form factor studies. New final results from the analysis of 381 K± p± rare decay candidates collected by the NA48/2 and NA62 experiments at CERN are presented. The results include a decay rate measurement and fits to Chiral Perturbation Theory (ChPT) description.
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