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Title: Study of the a0(980) meson via the radiative decay phi -> eta pi0 gamma with the KLOE detector
Authors: Ambrosino, Fabio
Bacci, Cesare
Bocchetta, Simona Serena
Ceradini, Filippo
Di Micco, Biagio
Nguyen, Federico
Keywords: e+e− collisions
KLOE experiment
Rare phi decays
Scalar mesons
Quark model
Issue Date: Sep-2009
Publisher: Elsevier Science
Source: 3
Abstract: We have studied the phi-> a0(980) gamma process with the KLOE detector at the Frascati phi-factory DAFNE by detecting the phi -> eta pi0 gamma decays in the final states with η -> gamma gamma and eta -> pi+ pi- pi0. We have measured the branching ratios for both final states: Br(phi -> eta pi0 gamma) = (7.01 ± 0.10 ± 0.20)×10−5 and (7.12 ± 0.13 ± 0.22)×10−5, respectively. We have also extracted the a0(980) mass and its couplings to eta-pi0, K+K−, and to the φ-meson from the fit of the eta-pi0 invariant mass distributions using different phenomenological models.
DOI: 10.1016/j.physletb.2009.09.022
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

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