Study of the a(0)(980) meson via the radiative decay phi -> eta pi(0)gamma with the KLOE detector
- Ambrosino, F
- Antonelli, A
- Antonelli, M
- Archilli, F
- Bacci, C
- Beltrame, P
- Bencivenni, G
- Bertolucci, S
- Bini, C
- Bloise, C
- Bocchetta, S
- Bossi, F
- Branchini, P
- Campana, P
- Capon, G
- Capussela, T
- Ceradini, F
- Chi, S
- Chiefari, G
- Ciambrone, P
- De Lucia, E
- De Santis, A
- De Simone, P
- De Zorzi, G
- Denig, A
- Di Domenico, A
- DI DONATO, Camilla
- Di Micco, B
- Doria, A
- Dreucci, M
- Felici, G
- Ferrari, A
- Ferrer, Ml
- Fiore, S
- Forti, C
- Franzini, P
- Gatti, C
- Gauzzi, P
- Giovannella, S
- Gorini, E
- Graziani, E
- 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
- Muller, S
- Murtas, F
- Napolitano, M
- Nguyen, F
- Palutan, M
- Pasqualucci, E
- Passeri, A
- Patera, V
- Perfetto, F
- Primavera, M
- Santangelo, P
- Saracino, G
- Sciascia, B
- Sciubba, A
- Sibidanov, A
- Spadaro, T
- Testa, M
- Tortora, L
- Valente, P
- Venanzoni, G
- Versaci, R
- Volpe, R
- Xu, G.
DOIAbstract
We have studied the phi -> a(0)(980)gamma process with the KLOE detector at the Frascati phi-factory DA Phi NE by detecting the phi -> eta pi(0)gamma decays in the final states with eta -> gamma gamma and eta -> pi(+)pi(-)pi(0). We have measured the branching ratios for both final states: Br(phi -> eta pi(0)gamma) = (7.01 +/- 0.10 +/- 0.20) x 10(-5) and (7.12 +/- 0.13 +/- 0.22) x 10(-5), respectively. We have also extracted the a(0)(980) mass and its couplings to eta pi(0), K+K-, and to the phi meson from the fit of the eta pi(0) invariant mass distributions using different phenomenological models
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