Precision measurement of the η → π + π − π 0 Dalitz plot distribution with the KLOE detector

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Published
EU, Europeiska forskningsrådet [RII3-CT- 2004-506078]
EU, Europeiska forskningsrådet [227431]
gratis
Using 1.6 fb−1 of e + e − → ϕ → ηγ data collected with the KLOE detector at DAΦNE, the Dalitz plot distribution for the η → π + π − π 0 decay is studied with the world’s largest sample of ∼ 4.7 · 106 events. The Dalitz plot density is parametrized as a polynomial expansion up to cubic terms in the normalized dimensionless variables X and Y . The experiment is sensitive to all charge conjugation conserving terms of the expansion, including a gX 2 Y term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements.

By the author/editor: Anastasi, A.; Babusci, D.; Bencivenni, G.; Berlowski, M.; Bloise, C.; Bossi, F.; show more...; Branchini, P.; Budano, A.; Caldeira Balkest ...; Cao, Bo; Ceradini, F.; Ciambrone, P.; Curciarello, F.; Czerwinski, E.; D’Agostini, G.; Danè, E.; De Leo, V.; De Lucia, E.; De Santis, A.; De Simone, P.; Di Cicco, A.; Di Domenico, A.; Di Salvo, R.; Domenici, D.; D’Uffizi, A.; Fantini, A.; Felici, G.; Fiore, S.; Gajos, A.; Gauzzi, P.; Giardina, G.; Giovannella, S.; Graziani, E.; Happacher, F.; Heijkenskjöld, L ...; Ikegami Andersso ...; Johansson, Tord; Kaminska, D.; Krzemien, W.; Kupsc, Andrzej; Loffredo, S.; Mandaglio, G.; Martini, M.; Mascolo, M.; Messi, R.; Miscetti, S.; Morello, G.; Moricciani, D.; Moskal, P.; Papenbrock, Mich ...; Passeri, A.; Patera, V.; Perez del Rio, E ...; Ranieri, A.; Santangelo, P.; Sarra, I.; Schioppa, M.; Silarski, M.; Sirghi, F.; Tortora, L.; Venanzoni, G.; Wislicki, W.; Wolke, Magnus; show less...

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