Lepton flavour universality test at the CERN NA62 experiment

Abstract

A precision test of lepton universality by measurement of the ratio RK of K-->e nu to K-->mu nu decay rates was performed using a sample of 59963 K-->e nu 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.

A talk given at the BEACH 2010 conference (Perugia, June 2010). 6 pages, 4 figures

References in corpus (2)

• Hints of large tan(beta) in flavour physics
• The Standard Model prediction for R_{e/mu}^{(pi,K)}