A sample of about 300 K± → π±γγ rare decays with a background contamination below 10% has been collected by the NA48/2 and NA62 experiments at CERN during low intensity runs with minimum bias trigger configuration. The measurements of the decay spectrum and rate provide a crucial test of the Chiral Perturbation Theory (ChPT) describing weak processes at low energy.
Study of the rare decay K± → π±γγ in the NA48/2 and NA62 experiments at CERN / Piccini M., 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. - (2013), pp. 279-282. (48th Rencontres de Moriond on QCD and High Energy Interactions 2013 Aosta Valley, ita 2013).
Study of the rare decay K± → π±γγ in the NA48/2 and NA62 experiments at CERN
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.;
2013
Abstract
A sample of about 300 K± → π±γγ rare decays with a background contamination below 10% has been collected by the NA48/2 and NA62 experiments at CERN during low intensity runs with minimum bias trigger configuration. The measurements of the decay spectrum and rate provide a crucial test of the Chiral Perturbation Theory (ChPT) describing weak processes at low energy.
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