Precision measurement of the ratio of the charged kaon leptonic decay rates

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RESEARCH PRODUCT

Precision measurement of the ratio of the charged kaon leptonic decay rates

O. Yushchenko P. Valente V. Kurshetsov H. O. Danielsson Roberta Arcidiacono P. L. Frabetti Viacheslav Duk E. Gushchin Emilio Leonardi T. Numao M. Serra Massimiliano Fiorini S. Gallorini M. Moulson M. Veltri P. F. Dalpiaz F. Marchetto B. Renk V. Kekelidze Roland Winston A. Zinchenko Konrad Kleinknecht R. Wanke S. Movchan Andrea Bizzeti S. Giudici Antonino Sergi Mauro Raggi S. Goy Lopez F. Ambrosino M. Lenti D. Coward M. Pepe M. Savrie P. Rubin A. Peters S. Shkarovskiy Leander Litov A. Winhart B. Bloch-devaux G. D'agostini E. Iacopini Cristina Biino Paolo Massarotti W. Baldini V. Palladino Jürgen Engelfried G. Lamanna A. Gianoli G. Dellacasa S. Venditti M. Misheva T. Spadaro Giuseppe Ruggiero M. Hita-hochgesand A. Salamon B. Hallgren V. Falaleev I. Mannelli L. Gatignon D. Madigozhin B. Peyaud Yu. Potrebenikov F. Costantini Petra Riedler V. Obraztsov I. Popov A. Fucci F. Retiere Evgueni Goudzovski G. Pierazzini A. Romano G. Collazuol Simone Bifani F. Petrucci V K Semenov Roberto Piandani A. Norton M. Piccini R. Fantechi N. Doble A. Cotta Ramusino D. Di Filippo V. Bolotov S. Balev M. Sozzi L. Dilella A. A. Maier E. Imbergamo F. Bucci Cristina Lazzeroni A. Antonelli V. Kozhuharov C. Cerri G. Saracino G. Anzivino N. A. Molokanova K. Eppard M. Napolitano A. Ceccucci Evelina Gersabeck P. Cenci

subject

Nuclear and High Energy Physics Particle physics standard model FOS: Physical sciences NA62 experiment 01 natural sciences High Energy Physics - Experiment Standard Model Nuclear physics High Energy Physics - Experiment (hep-ex)lepton universality Rare kaon decays; chiral perturbation theory Lepton universality; Charged Kaon Decay 0103 physical sciences kaon decays leptonic decays lepton universality 010306 general physics chiral perturbation theory Physics leptonic decays Large Hadron Collider kaon decays 010308 nuclear & particles physics charged kaon 3. Good health Charged Kaon Decay Rare kaon decays Kaon rare decays Full data Kaon rare decays; branching ratio; charged kaon; leptonic decays; standard model branching ratio Particle Physics - Experiment Lepton universality

description

A precision measurement of the ratio RK of the rates of kaon leptonic decays K+- --> e nu and K+- --> mu nu 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 nu candidates with 11% background contamination, is RK = (2.488+-0.010)*10^{-5}, in agreement with the Standard Model expectation.

year	journal	country	edition	language
2013-02-01

10.1016/j.physletb.2013.01.037 https://hdl.handle.net/11576/2591436