Dalitz plot analysis of e+ e- -> pi0 pi0 gamma events at s**(1/2) approximately M(phi) with the KLOE detector
- Ambrosino, F.
- Antonelli, A.
- Antonelli, M.
- Bacci, C.
- Beltrame, P.
- Bencivenni, G.
- Bertolucci, S.
- Bini, C.
- Bloise, C.
- Bocchetta, S.
- Bocci, V.
- Bossi, F.
- Bowring, D.
- Branchini, P
- Caloi, R
- Campana, P
- Capon, G
- Capussela, T
- Ceradini, F
- Chi, S
- Chiefari, G
- Ciambrone, P
- Conetti, S
- De Lucia, E
- De Santis, A
- De Simone, P
- De Zorzi, G
- Dell'Agnello, S
- Denig, A
- Di Domenico, A
- Di Donato, C
- Di Falco, S
- Di Micco, B
- Doria, A
- Dreucci, M
- Felici, G
- Ferrari, A
- Ferrer, M. L
- Finocchiaro, G
- Fiore, S
- Forti, C
- Franzini, P
- Gatti, C
- Gauzzi, P
- Giovannella, S
- Gorini, E
- Graziani, E
- Incagli, M
- Kluge, W
- Kulikov, V
- Lacava, F
- Lanfranchi, G
- Lee Franzini, J
- Leone, D
- Martini, M
- Massarotti, P
- Mei, W
- Meola, S
- Miscetti, S
- Moulson, M
- Müller, S
- Murtas, F
- Napolitano, M
- Nguyen, F
- Palutan, M
- Pasqualucci, E
- Passeri, A
- Patera, V
- Perfetto, F
- Pontecorvo, L
- Primavera, M
- Santangelo, P
- Saracino, G
- Sciascia, B
- Sciubba, A
- Scuri, F
- Sfiligoi, I
- Spadaro, T
- Testa, M
- Tortora, L
- Valente, P
- Valeriani, B
- Venanzoni, G
- Veneziano, S
- Ventura, A
- Versaci, R
- Xu, G.
- SANTOVETTI, EMANUELE
DOIAbstract
We have studied the Dalitz plot of the e+e -→π0π0γ events (N π0π0γ ∼ 65000) collected at √s ≃ M φ with the KLOE detector. In the dipion invariant mass (Mππ) region below 700 MeV, the process under study is dominated by the non-resonant process e+e-→ωπ0 with ω→π0γ whereas, for higher Mππ values, the radiative φ decay to the f0(980) is the dominant mechanism. Different theoretical models are used to fit the Dalitz plot, taking also into account a possible contribution of the σ(600). For each model, we extract the f0(980) mass and its coupling to ππ, KK̄ and to the φ. © Springer-Verlag Berlin Heidelberg 2007