Issue |
EPJ Web of Conferences
Volume 37, 2012
MESON 2012 – 12th International Workshop on Production, Properties and Interaction of MESONS
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|
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Article Number | 01010 | |
Number of page(s) | 6 | |
Section | Plenary talks | |
DOI | https://doi.org/10.1051/epjconf/20123701010 | |
Published online | 06 December 2012 |
https://doi.org/10.1051/epjconf/20123701010
Kaon Physics at CERN – Recent Results from the NA48/2 and NA62 Experiments
Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany
a e-mail: awinhart@uni-mainz.de
This letter presents recent results from the kaon experiments NA48/2 and its successor NA62 at CERN. With samples of 2.5 × 106 Kµ3± and 4.0 × 106 Ke3± events collected by NA48/2 in 2004, precise measurements of the form factors were performed. The Chiral Perturbation Theory was tested through a new study of K± → π±γγ decays based on data taken with minimal trigger conditions. Using the beam line and detector of NA48/2 in the years 2007-2008, NA62 performed a precison measurement of the helicitysuppressed ratio of the charged kaon leptonic decay rates K± → e+ν and K± → μ+ν Using the full data set, which is about ten times larger than the previous world data sample, the total uncertainty on this ratio is only 0.4%, representing a precision test of μ – e lepton universality. Finally, the main stage of the NA62 experiment is presented. The planned measurement of the ultra rare decay K+ → π+ at 10% precision will provide a powerful test of the Standard Model. The experimental challenges to reach this goal require new detectors with exceptional performances.
© Owned by the authors, published by EDP Sciences, 2012
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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