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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Lenguaje: | eng |
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2017
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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 |
record_format | invenio |
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 |