Observation of the rare η→e+e−e+e− decay with the KLOE experiment

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ID: 273934
2011
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Abstract
We report the first observation of the rare η→e+e−e+e−(γ) decay based on 1.7fb−1 collected by the KLOE experiment at the DAΦNE ϕ-factory. The selection of the e+e−e+e− final state is fully inclusive of radiation. We have identified 362±29 events resulting in a branching ratio of (2.4±0.2stat+bckg±0.1syst)×10−5.
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wolke2011physicsobservation Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors F. Ambrosino, A. Antonelli, F. Archilli, I. Balwierz, G. Bencivenni, C. Bini, C. Bloise, S. Bocchetta, F. Bossi, P. Branchini, G. Capon, T. Capussela, F. Ceradini, P. Ciambrone, E. Czerwiński, E. De Lucia, A. De Santis, P. De Simone, G. De Zorzi, A. Denig, A. Di Domenico, C. Di Donato, B. Di Micco, M. Dreucci, G. Felici, S. Fiore, P. Franzini, C. Gatti, P. Gauzzi, S. Giovannella, E. Graziani, M. Jacewicz, J. Lee-Franzini, M. Martemianov, M. Martini, P. Massarotti, S. Meola, S. Miscetti, G. Morello, M. Moulson, S. Müller, M. Napolitano, F. Nguyen, M. Palutan, A. Passeri, V. Patera, I. Prado Longhi, P. Santangelo, B. Sciascia, M. Silarski, T. Spadaro, C. Taccini, L. Tortora, G. Venanzoni, R. Versaci, G. Xu, J. Zdebik, D. Babusci, D. Badoni, V. Bocci, A. Budano, S.A. Bulychjev, P. Campana, E. Dané, G. De Robertis, D. Domenici, O. Erriquez, G. Fanizzi, F. Gonnella, F. Happacher, B. Höistad, E. Iarocci, T. Johansson, V. Kulikov, A. Kupsc, F. Loddo, M. Matsyuk, R. Messi, D. Moricciani, P. Moskal, A. Ranieri, I. Sarra, M. Schioppa, A. Sciubba, W. Wiślicki, M. Wolke
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Journal physics letters b
Year 2011
DOI
10.1016/j.physletb.2011.07.033
URL
https://sciprofiles.com/publication/view/3eeffc4053a6b2a37d7f929f1359c7c0
Keywords
e+e− collisions e+e− rare η decays

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