Results from NA48/2 on $\pi-\pi$ scattering lengths measurements in $K^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ and $K^{\pm} \rightarrow \pi^{0}\pi^{0}\pi^{\pm}$ decays

Very large statistics of charged kaon decays have been accumulated in 2003-2004 by the NA48/2 experiment at the CERN SPS. The analyses of K ± → π 0π 0π ± (K3π) and K ± → π +π −e ±ν (Ke4) decays give complementary approaches to the study of low energy ππ scattering. From data samples of 60 millions K...

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Autor principal: Bloch-Devaux, B
Lenguaje:eng
Publicado: 2008
Materias:
Particle Physics
Acceso en línea:http://cds.cern.ch/record/1191412
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author Bloch-Devaux, B
author_facet Bloch-Devaux, B
author_sort Bloch-Devaux, B
collection CERN
description Very large statistics of charged kaon decays have been accumulated in 2003-2004 by the NA48/2 experiment at the CERN SPS. The analyses of K ± → π 0π 0π ± (K3π) and K ± → π +π −e ±ν (Ke4) decays give complementary approaches to the study of low energy ππ scattering. From data samples of 60 millions K3π and more than 1 million Ke4 decays, precise values of a0 and a2, the isospin 0 and 2 S-wave ππ scattering lengths, can be extracted with an unprecedented experimental precision of few percents, allowing accurate tests of Chiral Perturbation Theory predictions. The form factors of the Ke4 decays and their energy dependence are also measured with an improved precision while the Dalitz plot parameters of the K3π decays are determined including a new quadratic term
id cern-1191412
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2008
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spelling cern-11914122019-09-30T06:29:59Zhttp://cds.cern.ch/record/1191412engBloch-Devaux, BResults from NA48/2 on $\pi-\pi$ scattering lengths measurements in $K^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ and $K^{\pm} \rightarrow \pi^{0}\pi^{0}\pi^{\pm}$ decaysParticle PhysicsVery large statistics of charged kaon decays have been accumulated in 2003-2004 by the NA48/2 experiment at the CERN SPS. The analyses of K ± → π 0π 0π ± (K3π) and K ± → π +π −e ±ν (Ke4) decays give complementary approaches to the study of low energy ππ scattering. From data samples of 60 millions K3π and more than 1 million Ke4 decays, precise values of a0 and a2, the isospin 0 and 2 S-wave ππ scattering lengths, can be extracted with an unprecedented experimental precision of few percents, allowing accurate tests of Chiral Perturbation Theory predictions. The form factors of the Ke4 decays and their energy dependence are also measured with an improved precision while the Dalitz plot parameters of the K3π decays are determined including a new quadratic termoai:cds.cern.ch:11914122008
spellingShingle Particle Physics
Bloch-Devaux, B
Results from NA48/2 on $\pi-\pi$ scattering lengths measurements in $K^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ and $K^{\pm} \rightarrow \pi^{0}\pi^{0}\pi^{\pm}$ decays
title Results from NA48/2 on $\pi-\pi$ scattering lengths measurements in $K^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ and $K^{\pm} \rightarrow \pi^{0}\pi^{0}\pi^{\pm}$ decays
title_full Results from NA48/2 on $\pi-\pi$ scattering lengths measurements in $K^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ and $K^{\pm} \rightarrow \pi^{0}\pi^{0}\pi^{\pm}$ decays
title_fullStr Results from NA48/2 on $\pi-\pi$ scattering lengths measurements in $K^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ and $K^{\pm} \rightarrow \pi^{0}\pi^{0}\pi^{\pm}$ decays
title_full_unstemmed Results from NA48/2 on $\pi-\pi$ scattering lengths measurements in $K^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ and $K^{\pm} \rightarrow \pi^{0}\pi^{0}\pi^{\pm}$ decays
title_short Results from NA48/2 on $\pi-\pi$ scattering lengths measurements in $K^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ and $K^{\pm} \rightarrow \pi^{0}\pi^{0}\pi^{\pm}$ decays
title_sort results from na48/2 on $\pi-\pi$ scattering lengths measurements in $k^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ and $k^{\pm} \rightarrow \pi^{0}\pi^{0}\pi^{\pm}$ decays
topic Particle Physics
url http://cds.cern.ch/record/1191412
work_keys_str_mv AT blochdevauxb resultsfromna482onpipiscatteringlengthsmeasurementsinkpmrightarrowpipiepmnuandkpmrightarrowpi0pi0pipmdecays

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