Precision measurement of the ratio of the charged kaon leptonic decay rates
Physics Letters B2013Vol. 719(4-5), pp. 326–336
Citations Over TimeTop 10% of 2013 papers
C. Lazzeroni, Antonio Romano, A. Ceccucci, H. Danielsson, V. Falaleev, L. Gatignon, S. Goy López, B. Hallgren, A. Maier, A. Peters, B. Pietrzyk, P. Riedler, P.L. Frabetti, E. Gersabeck, V. Kekelidze, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, P. Rubin, W. Baldini, A. Cotta Ramusino, P. Dalpiaz, M. Fiorini, A. Gianoli, A. Norton, F. Petrucci, M. Savrié, A. Bizzeti, F. Bucci, E. Iacopini, M. Lenti, M. Veltri, A. Antonelli, M. Moulson, M. Raggi, T. Spadaro, K. Eppard, M. Hita-Hochgesand, K. Kleinknecht, B. Renk, R. Wanke, A. Winhart, R. Winston, В.Н. Болотов, V. Duk, E. Gushchin, F. Ambrosino, D. Di Filippo, P. Massarotti, M. Napolitano, V. Palladino, G. Saracino, G. Anzivino, E. Imbergamo, R. Piandani, A. Sergi, P. Cenci, M. Pepé, F. Costantini, N. Doble, S. Giudici, G. Pierazzini, M. Sozzi, S. Venditti, S. Balev, G. Collazuol, L. DiLella, S. Gallorini, E. Goudzovski, G. Lamanna, I. Mannelli, G. Ruggiero, C. Cerri, R. Fantechi, V. Kurshetsov, V. Obraztsov, I. Popov, V. Semenov, O. Yushchenko, G. D’Agostini, E. Leonardi, M. Serra, P. Valente, A. Fucci, Á. Salamon, B. Bloch-Devaux, B. Peyaud, J. Engelfried, D. Coward, V. Kozhuharov, L. Litov, R. Arcidiacono, S. Bifani, C. Biino, G. Dellacasa, F. Marchetto, T. Numao, F. Retière
Abstract
A precision measurement of the ratio RK of the rates of kaon leptonic decays K±→e±ν and K±→μ±ν with the full data sample collected by the NA62 experiment at CERN in 2007–2008 is reported. The result, obtained by analysing ∼150000 reconstructed K±→e±ν candidates with 11% background contamination, is RK=(2.488±0.010)×10−5, in agreement with the Standard Model expectation.
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