Study of the $K^{\pm} \to \pi^{\pm}\pi^{0}e^{+}e^-$ decay by the NA48/2 experiment at CERN

The first observation of about 5000 candidates, with a 5% background contamination, of the rare decay K (±)→π (±) π (0) e (+) e (−) is reported by the NA48/2 experiment at CERN. From the analysis of 1.7 × 10(11) kaon decays collected in 2003-2004, the preliminary branching ratio in the full kinemati...

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Autor principal: Bloch-Devaux, B
Lenguaje:eng
Publicado: 2017
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1742-6596/800/1/012029
http://cds.cern.ch/record/2288063
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author Bloch-Devaux, B
author_facet Bloch-Devaux, B
author_sort Bloch-Devaux, B
collection CERN
description The first observation of about 5000 candidates, with a 5% background contamination, of the rare decay K (±)→π (±) π (0) e (+) e (−) is reported by the NA48/2 experiment at CERN. From the analysis of 1.7 × 10(11) kaon decays collected in 2003-2004, the preliminary branching ratio in the full kinematic region is measured to be B(K → π (±) π (0) e (+) e(−) ) = (4.22 ± 0.15) × 10(−)(6). The observed value is in perfect agreement with theoretical predictions based on Chiral Perturbation Theory.
id oai-inspirehep.net-1519308
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2017
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spelling oai-inspirehep.net-15193082021-02-09T10:05:28Zdoi:10.1088/1742-6596/800/1/012029http://cds.cern.ch/record/2288063engBloch-Devaux, BStudy of the $K^{\pm} \to \pi^{\pm}\pi^{0}e^{+}e^-$ decay by the NA48/2 experiment at CERNParticle Physics - ExperimentThe first observation of about 5000 candidates, with a 5% background contamination, of the rare decay K (±)→π (±) π (0) e (+) e (−) is reported by the NA48/2 experiment at CERN. From the analysis of 1.7 × 10(11) kaon decays collected in 2003-2004, the preliminary branching ratio in the full kinematic region is measured to be B(K → π (±) π (0) e (+) e(−) ) = (4.22 ± 0.15) × 10(−)(6). The observed value is in perfect agreement with theoretical predictions based on Chiral Perturbation Theory.oai:inspirehep.net:15193082017
spellingShingle Particle Physics - Experiment
Bloch-Devaux, B
Study of the $K^{\pm} \to \pi^{\pm}\pi^{0}e^{+}e^-$ decay by the NA48/2 experiment at CERN
title Study of the $K^{\pm} \to \pi^{\pm}\pi^{0}e^{+}e^-$ decay by the NA48/2 experiment at CERN
title_full Study of the $K^{\pm} \to \pi^{\pm}\pi^{0}e^{+}e^-$ decay by the NA48/2 experiment at CERN
title_fullStr Study of the $K^{\pm} \to \pi^{\pm}\pi^{0}e^{+}e^-$ decay by the NA48/2 experiment at CERN
title_full_unstemmed Study of the $K^{\pm} \to \pi^{\pm}\pi^{0}e^{+}e^-$ decay by the NA48/2 experiment at CERN
title_short Study of the $K^{\pm} \to \pi^{\pm}\pi^{0}e^{+}e^-$ decay by the NA48/2 experiment at CERN
title_sort study of the $k^{\pm} \to \pi^{\pm}\pi^{0}e^{+}e^-$ decay by the na48/2 experiment at cern
topic Particle Physics - Experiment
url https://dx.doi.org/10.1088/1742-6596/800/1/012029
http://cds.cern.ch/record/2288063
work_keys_str_mv AT blochdevauxb studyofthekpmtopipmpi0eedecaybythena482experimentatcern