First observation and study of the K± → π±π0e+e− decay

First observation and study of the K± → π±π0e+e− decay

The NA48/2 experiment at CERN reports the first observation of the K±→π±π0e+e− decay from an exposure of 1.7×1011 charged kaon decays recorded in 2003–2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region, BR...

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Main Authors: J.R. Batley, G. Kalmus, C. Lazzeroni, D.J. Munday, M.W. Slater, S.A. Wotton, R. Arcidiacono, G. Bocquet, N. Cabibbo, A. Ceccucci, D. Cundy, V. Falaleev, M. Fidecaro, L. Gatignon, A. Gonidec, W. Kubischta, A. Maier, A. Norton, M. Patel, A. Peters, S. Balev, P.L. Frabetti, E. Gersabeck, E. Goudzovski, P. Hristov, V. Kekelidze, V. Kozhuharov, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, I. Polenkevich, Yu. Potrebenikov, S. Stoynev, A. Zinchenko, E. Monnier, E. Swallow, R. Winston, P. Rubin, A. Walker, P. Dalpiaz, C. Damiani, M. Fiorini, M. Martini, F. Petrucci, M. Savrié, M. Scarpa, H. Wahl, W. Baldini, A. Cotta Ramusino, A. Gianoli, M. Calvetti, E. Celeghini, E. Iacopini, M. Lenti, G. Ruggiero, A. Bizzeti, M. Veltri, M. Behler, K. Eppard, M. Hita-Hochgesand, K. Kleinknecht, P. Marouelli, L. Masetti, U. Moosbrugger, C. Morales Morales, B. Renk, M. Wache, R. Wanke, A. Winhart, D. Coward, A. Dabrowski, T. Fonseca Martin, M. Shieh, M. Szleper, M. Velasco, M.D. Wood, G. Anzivino, E. Imbergamo, A. Nappi, M. Piccini, M. Raggi, M. Valdata-Nappi, P. Cenci, M. Pepe, M.C. Petrucci, F. Costantini, N. Doble, L. Fiorini, S. Giudici, G. Pierazzini, M. Sozzi, S. Venditti, G. Collazuol, L. DiLella, G. Lamanna, I. Mannelli, A. Michetti, C. Cerri, R. Fantechi, B. Bloch-Devaux, C. Cheshkov, J.B. Chèze, M. De Beer, J. Derré, G. Marel, E. Mazzucato, B. Peyaud, B. Vallage, M. Holder, M. Ziolkowski, S. Bifani, M. Clemencic, S. Goy Lopez, C. Biino, N. Cartiglia, F. Marchetto, H. Dibon, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, L. Widhalm
Format: Article
Language:English
Published: Elsevier 2019-01-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S037026931830892X

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http://www.sciencedirect.com/science/article/pii/S037026931830892X

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