| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10725452 | Physics Letters B | 2011 | 10 Pages |
Abstract
A precision test of lepton flavour universality has been performed by measuring the ratio RK of kaon leptonic decay rates K+âe+ν and K+âμ+ν in a sample of 59â813 reconstructed K+âe+ν candidates with (8.71±0.24)% background contamination. The result RK=(2.487±0.013)Ã10â5 is in agreement with the Standard Model expectation.
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Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
NA62 Collaboration NA62 Collaboration, C. Lazzeroni, A. Romano, A. Ceccucci, H. Danielsson, V. Falaleev, L. Gatignon, S. Goy Lopez, B. Hallgren, A. Maier, A. Peters, M. Piccini, P. Riedler, M. Dyulendarova, P.L. Frabetti, V. Kekelidze, D. Madigozhin,