Test of lepton flavour universality in K+→ℓ+ν decays
(2011) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 698, n° 2, p. 105-114 (2011)
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- Abstract
- A precision test of lepton flavour universality has been performed by measuring the ratio R<inf>K</inf> of kaon leptonic decay rates K<sup>+</sup>→e<sup>+</sup>ν and K<sup>+</sup>→μ<sup>+</sup>νin a sample of 59813 reconstructed K+→ℓ+ν candidates with (8.71±0.24)% background contamination. The result R<inf>K</inf>=(2.487±0.013)×10<sup>-5</sup> is in agreement with the Standard Model expectation. © 2011 Elsevier B.V.
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Citations
Lazzeroni, C., Romano, A., Ceccucci, A., Danielsson, H., Falaleev, V., Gatignon, L., Lopez, S. G., Hallgren, B., Maier, A., Peters, A., Piccini, M., Riedler, P., Dyulendarova, M., Frabetti, P. L., Kekelidze, V., Madigozhin, D., Marinova, E., Molokanova, N., Movchan, S., et al. (2011). Test of lepton flavour universality in K+→ℓ+ν decays. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 698(2), 105-114. https://doi.org/10.1016/j.physletb.2011.02.064 (Original work published 2011)