A precision measurement of the ratio RK of the rates of kaon leptonic decays K±→e±ν and K±→μ±ν with the full data sample collected by the NA62 experiment at CERN in 2007-2008 is reported. The result, obtained by analysing ~150000 reconstructed K±→e±ν candidates with 11% background contamination, is RK=(2.488±0.010)×10-5, in agreement with the Standard Model expectation. © 2013 Elsevier B.V.
Precision measurement of the ratio of the charged kaon leptonic decay rates
COLLAZUOL, GIANMARIA;
2013
Abstract
A precision measurement of the ratio RK of the rates of kaon leptonic decays K±→e±ν and K±→μ±ν with the full data sample collected by the NA62 experiment at CERN in 2007-2008 is reported. The result, obtained by analysing ~150000 reconstructed K±→e±ν candidates with 11% background contamination, is RK=(2.488±0.010)×10-5, in agreement with the Standard Model expectation. © 2013 Elsevier B.V.File in questo prodotto:
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