Lepton flavour universality test at the CERN NA62 experiment

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A precision test of lepton universality by measurement of the ratio RK of K+→e+ν to K+→μ+ν decay rates was performed using a sample of 59963 K+→e+ν candidates with 8.8% background contamination collected by the CERN NA62 experiment. The result RK=(2.486±0.013)×10−5 is in agreement with the Standard Model expectation.
Original languageEnglish
Pages (from-to)163-168
Number of pages6
JournalNuclear Physics B - Proceedings Supplements
Publication statusPublished - 1 Jan 2011
EventInternational Conference on Beauty, Charm and Hyperons in Hadronic Interactions, 9th - Perugia, Italy
Duration: 21 Jun 201026 Jun 2010


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