Model independent measurement of the leptonic kaon decay K± → μ±νμe+e- with the NA48/2 experiment

Radoslav Marchevski, G. Anzivino, R. Arcidiacono, W. Baldini, S. Balev, J. R. Batley, M. Behler, S. Bifani, C. Biino, A. Bizzeti, B. Bloch-Devaux, G. Bocquet, N. Cabibbo, M. Calvetti, N. Cartiglia, A. Ceccucci, P. Cenci, C. Cerri, C. Cheshkov, J. B. ChèzeM. Clemencic, G. Collazuol, F. Costantini, A. Cotta Ramusino, D. Coward, D. Cundy, A. Dabrowski, P. Dalpiaz, C. Damiani, M. De Beer, J. Derré, H. Dibon, L. Dilella, N. Doble, K. Eppard, V. Falaleev, R. Fantechi, M. Fidecaro, L. Fiorini, M. Fiorini, T. Fonseca Martin, P. L. Frabetti, L. Gatignon, E. Gersabeck, A. Gianoli, S. Giudici, A. Gonidec, E. Goudzovski, S. Goy Lopez, M. Holder, P. Hristov, E. Iacopini, E. Imbergamo, M. Jeitler, G. Kalmus, V. Kekelidze, K. Kleinknecht, V. Kozhuharov, W. Kubischta, G. Lamanna, C. Lazzeroni, M. Lenti, L. Litov, D. Madigozhin, A. Maier, I. Mannelli, F. Marchetto, R. Marchevski, G. Marel, M. Markytan, P. Marouelli, M. Martini, L. Masetti, E. Mazzucato, A. Michetti, I. Mikulec, N. Molokanova, E. Monnier, U. Moosbrugger, C. Morales Morales, D. J. Munday, A. Nappi, G. Neuhofer, A. Norton, M. Patel, M. Pepe, A. Peters, F. Petrucci, M. C. Petrucci, B. Peyaud, M. Piccini, G. Pierazzini, I. Polenkevich, Yu Potrebenikov, M. Raggi, B. Renk, P. Rubin, G. Ruggiero, M. Savrié, M. Scarpa, M. Shieh, M. W. Slater, M. Sozzi, S. Stoynev, E. Swallow, M. Szleper, M. Valdata-Nappi, B. Vallage, M. Velasco, M. Veltri, S. Venditti, M. Wache, H. Wahl, A. Walker, R. Wanke, L. Widhalm, A. Winhart, R. Winston, M. D. Wood, S. A. Wotton, A. Zinchenko, M. Ziolkowski

Research output: Contribution to journalConference articlepeer-review

Abstract

A measurement of the branching ratio of the rare leptonic kaon decay± → μ±νμe+e- is presented using data collected by the NA48/2 experiment in 2003 and 2004. The measurement is performed in the region Mee > 140 MeV/c2. In this particular region low energy QCD contributions become important and can be calculated in the framework of Chiral Perturbation Theory (ChPT). From a total number of 1.56 × 1011 recorded kaon decays, the branching ratio is measured to be B (K± → μ±νμe+e-|Mee > 140MeV/c2) = (7.8 ±0.2) × 10-8.

Original languageEnglish (US)
JournalProceedings of Science
VolumePart F128556
StatePublished - 2016
Event38th International Conference on High Energy Physics, ICHEP 2016 - Chicago, United States
Duration: Aug 3 2016Aug 10 2016

ASJC Scopus subject areas

  • General

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