Lepton universality test with Kl2 decays at NA62 experiment

Details Lepton universality test with Kl2 decays at NA62 experiment Lepton universality test with Kl2 decays at NA62 experiment

2010-06-07

arxiv.org/abs/1006.1201v1

Physics

High Energy Physics

High Energy Physics - Experiment

Lake Louise Winter Institute 2010 proceedings

Scientific paper

The experiment NA62 at CERN collected a large sample of K+- leptonic decays in order to perform precise test of lepton universality, by measuring the helicity suppressed ratio R_K=Gamma(K+- --> e+- nu)/Gamma(K+- --> mu+- nu). The preliminary result of the analysis based on 51089 K+ --> e+nu candidates is R_K=(2.500+-0.016)x10^{-5}, consistent with the predictions of the Standard Model.

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