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Lee-Franzini, L. Tortora, M. Antonelli, M. Dreucci, M. L. Ferrer, M. Martini, M. Moulson, M. Napolitano, M. Palutan, M. Testa, P. Beltrame, P. Branchini, P. Campana, P. Ciambrone, P. De Simone, P. Franzini, P. Gauzzi, P. Massarotti, P. Santangelo, P. Valente, R.Versaci, S. Bertolucci, S. Bocchetta, S. Fiore, S. Giovannella, S. Meola, S. Miscetti, S. Mueller, T. Capussela, The KLOE Collaboration: F. Ambrosino, T. Spadaro, V. Kulikov, V. Patera, W. Kluge","submitted_at":"2008-11-06T17:51:32Z","abstract_excerpt":"We present the result of a direct search for the decay K_S -> e+e-, obtained with a sample of e+e- -> phi -> K_S K_L events produced at DAFNE, the Frascati phi-factory, for an integrated luminosity of 1.9 fb^-1. The search has been performed using a pure K_S beam tagged by the simultaneous detection of a K_L interaction in the calorimeter. Background rejection has been optimized by using both kinematic and particle identification cuts. 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