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Measurement of η → π 0 γγ branching fraction with the KLOE detector

Abstract We present a measurement of the doubly radiative decay η → π 0 γγ based on a sample of 82 million η mesons produced in the e + e − → ϕ → ηγ process at the Frascati ϕ-factory DAΦNE. From the data analysis, 1246 ± 133 signal events were observed. By normalising the signal to the well-known η...

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Autors principals: The KLOE-2 collaboration, D. Babusci, P. Beltrame, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, B. Cao, F. Ceradini, P. Ciambrone, L. Cotrozzi, F. Curciarello, E. Czerwiński, G. D’Agostini, R. D’Amico, E. Danè, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Domenico, E. Diociaiuti, D. Domenici, A. D’Uffizi, G. Fantini, S. Fiore, A. Gajos, S. Gamrat, P. Gauzzi, S. Giovannella, E. Graziani, F. Ignatov, X. Kang, A. Kupsc, G. Mandaglio, M. Martini, S. Miscetti, P. Moskal, A. Passeri, V. Patera, E. Perez del Rio, L. Punzi, F. Sborzacchi, M. Schioppa, A. Selce, M. Silarski, F. Sirghi, E. P. Solodov, T. Teubner, G. Venanzoni, N. Vestergaard, W. Wiślicki, M. Wolke, E. Zaid
Format: Artigo
Idioma:Inglês
Publicat: SpringerOpen 2026-01-01
Col·lecció:Journal of High Energy Physics
Matèries:
e +-e − Experiments
Accés en línia:https://doi.org/10.1007/JHEP01(2026)091
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