A precision test of lepton flavour universality has been performed by measuring the ratio RK of kaon leptonic decay rates K+→e+ν and K+→μ+νin a sample of 59813 reconstructed K+→ℓ+ν candidates with (8.71±0.24)% background contamination. The result RK=(2.487±0.013)×10-5 is in agreement with the Standard Model expectation.
Test of lepton flavour universality in K⁺→ ℓ⁺ν decays
GIUDICI, SERGIO;SOZZI, MARCO STANISLAO;LAMANNA, GIANLUCA;
2011-01-01
Abstract
A precision test of lepton flavour universality has been performed by measuring the ratio RK of kaon leptonic decay rates K+→e+ν and K+→μ+νin a sample of 59813 reconstructed K+→ℓ+ν candidates with (8.71±0.24)% background contamination. The result RK=(2.487±0.013)×10-5 is in agreement with the Standard Model expectation.File in questo prodotto:
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