Precision measurement of the η → π + π − π 0 Dalitz plot distribution with the KLOE detector
- Anastasi, A.
- Babusci, D.
- Bencivenni, G.
- Berlowski, M.
- Bloise, C.
- Bossi, F.
- Branchini, P.
- Budano, A.
- Caldeira Balkeståh, Li
- 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, Lena
- Ikegami Andersson, Walter
- 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, Michael
- 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
DOIAbstract
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
Add to ORKG