Abstract: A precision measurement of the ratio R-K of the rates of kaon leptonic decays K-+/- -> e(+/-)v and K-+/- -> mu(+/-)v with the full data sample collected by the NA62 experiment at CERN in 2007-2008 is reported. The result, obtained by analysing similar to 150 000 reconstructed K-+/- -> e(+/-)v candidates with 11% background contamination, is R-K = (2.488 +/- 0.010) x 10(-5), in agreement with the Standard Model expectation
Precision measurement of the ratio of the charged kaon leptonic decay rates / 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;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;V. Bolotov;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. Pepe;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. DʼAgostini;E. Leonardi;M. Serra;P. Valente;A. Fucci;A. 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. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 719:(2013), pp. 326-336. [10.1016/j.physletb.2013.01.037]
Precision measurement of the ratio of the charged kaon leptonic decay rates
IACOPINI, ENRICO;M. Lenti;
2013
Abstract
Abstract: A precision measurement of the ratio R-K of the rates of kaon leptonic decays K-+/- -> e(+/-)v and K-+/- -> mu(+/-)v with the full data sample collected by the NA62 experiment at CERN in 2007-2008 is reported. The result, obtained by analysing similar to 150 000 reconstructed K-+/- -> e(+/-)v candidates with 11% background contamination, is R-K = (2.488 +/- 0.010) x 10(-5), in agreement with the Standard Model expectationFile | Dimensione | Formato | |
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