The $K^\pm \rightarrow \pi^{\pm} \pi^0 e^+ e^-$ decay: first observation and study with the NA48/2 experiment at CERN

The NA48/2 experiment collected data in 2003 and 2004 with the main purpose to study direct CP violation in charged kaons decaying into three pions. Thanks to the huge statistics collected, other studies are also possible. This paper reports the first observation of the K$^{±}$ → π$^{±}$π$^0$e$^+$e$...

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Autor principal: Anzivino, Giuseppina
Lenguaje:eng
Publicado: SISSA 2020
Materias:
Particle Physics - Experiment
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.22323/1.364.0237
http://cds.cern.ch/record/2765822
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author Anzivino, Giuseppina
author_facet Anzivino, Giuseppina
author_sort Anzivino, Giuseppina
collection CERN
description The NA48/2 experiment collected data in 2003 and 2004 with the main purpose to study direct CP violation in charged kaons decaying into three pions. Thanks to the huge statistics collected, other studies are also possible. This paper reports the first observation of the K$^{±}$ → π$^{±}$π$^0$e$^+$e$^−$ decay from an exposure of 1.7 x 10$^{11}$ charged kaon decays. The Branching Ratio has been determined to be BR(K$^{±}$ → π$^{±}$π$^0$e$^+$e$^−$) = (4.24 ± 0.14)x10$^{-6}$, using a sample of 4919 candidates with 4.9% background contamination. Studies of the kinematic space and of several P- and CP-violating asymmetries are also reported.
id oai-inspirehep.net-1830848
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2020
publisher SISSA
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spelling oai-inspirehep.net-18308482022-11-17T14:33:03Zdoi:10.22323/1.364.0237http://cds.cern.ch/record/2765822engAnzivino, GiuseppinaThe $K^\pm \rightarrow \pi^{\pm} \pi^0 e^+ e^-$ decay: first observation and study with the NA48/2 experiment at CERNParticle Physics - ExperimentNuclear Physics - ExperimentThe NA48/2 experiment collected data in 2003 and 2004 with the main purpose to study direct CP violation in charged kaons decaying into three pions. Thanks to the huge statistics collected, other studies are also possible. This paper reports the first observation of the K$^{±}$ → π$^{±}$π$^0$e$^+$e$^−$ decay from an exposure of 1.7 x 10$^{11}$ charged kaon decays. The Branching Ratio has been determined to be BR(K$^{±}$ → π$^{±}$π$^0$e$^+$e$^−$) = (4.24 ± 0.14)x10$^{-6}$, using a sample of 4919 candidates with 4.9% background contamination. Studies of the kinematic space and of several P- and CP-violating asymmetries are also reported.SISSAoai:inspirehep.net:18308482020
spellingShingle Particle Physics - Experiment
Nuclear Physics - Experiment
Anzivino, Giuseppina
The $K^\pm \rightarrow \pi^{\pm} \pi^0 e^+ e^-$ decay: first observation and study with the NA48/2 experiment at CERN
title The $K^\pm \rightarrow \pi^{\pm} \pi^0 e^+ e^-$ decay: first observation and study with the NA48/2 experiment at CERN
title_full The $K^\pm \rightarrow \pi^{\pm} \pi^0 e^+ e^-$ decay: first observation and study with the NA48/2 experiment at CERN
title_fullStr The $K^\pm \rightarrow \pi^{\pm} \pi^0 e^+ e^-$ decay: first observation and study with the NA48/2 experiment at CERN
title_full_unstemmed The $K^\pm \rightarrow \pi^{\pm} \pi^0 e^+ e^-$ decay: first observation and study with the NA48/2 experiment at CERN
title_short The $K^\pm \rightarrow \pi^{\pm} \pi^0 e^+ e^-$ decay: first observation and study with the NA48/2 experiment at CERN
title_sort $k^\pm \rightarrow \pi^{\pm} \pi^0 e^+ e^-$ decay: first observation and study with the na48/2 experiment at cern
topic Particle Physics - Experiment
Nuclear Physics - Experiment
url https://dx.doi.org/10.22323/1.364.0237
http://cds.cern.ch/record/2765822
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AT anzivinogiuseppina kpmrightarrowpipmpi0eedecayfirstobservationandstudywiththena482experimentatcern

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