%0 Conference Paper
%A Costantini, Flavio
%T Chiral Perturbation Theory tests at NA48 and NA62-<b>R</b><sub><b>K</b></sub> experiments at CERN
%N DESY-PROC-2014-04
%C Hamburg
%I Deutsches Elektronen-Synchrotron, DESY
%M PUBDB-2015-05508
%M DESY-PROC-2014-04
%P 619-623
%D 2014
%X Final results from an analysis of about 400 K<sup>±</sup>→π<sup>±</sup>γγ rare decay candidates collected by the NA48/2 and NA62-R<sub>K</sub> experiments at CERN during low intensity runs with minimum bias trigger configurations are presented. The results include a model-independent decay rate measurement and fits to Chiral Perturbation Theory (ChPT) description. The data support the ChPT prediction for a cusp in the di-photon invariant mass spectrum at the two pion threshold.
%B Panic2014
%C 25 Aug 2014 - 29 Aug 2014, Hamburg (Germany)
Y2 25 Aug 2014 - 29 Aug 2014
M2 Hamburg, Germany
%K talk: Hamburg 2014/08/24 (INSPIRE)
%K perturbation theory: chiral (INSPIRE)
%K threshold: two-pion (INSPIRE)
%K CERN Lab (INSPIRE)
%K NA48 (INSPIRE)
%K NA62 (INSPIRE)
%K mass spectrum (INSPIRE)
%K decay rate (INSPIRE)
%K mass spectrum: two-photon (INSPIRE)
%K K: rare decay (INSPIRE)
%K K: radiative decay (INSPIRE)
%K trigger (INSPIRE)
%K experimental results (INSPIRE)
%K K+ --> pi+ 2photon (INSPIRE)
%K K- --> pi- 2photon (INSPIRE)
%F PUB:(DE-HGF)29 ; PUB:(DE-HGF)8
%9 ReportContribution to a conference proceedings
%R 10.3204/DESY-PROC-2014-04/16
%U https://bib-pubdb1.desy.de/record/291650