We have studied the φ{symbol} → a 0 (980) γ process with the KLOE detector at the Frascati φ{symbol}-factory DAΦNE by detecting the φ{symbol} → η π 0 γ decays in the final states with η → γ γ and η → π + π - π 0. We have measured the branching ratios for both final states: Br (φ{symbol} → η π 0 γ) = (7.01 ± 0.10 ± 0.20) × 10 - 5 and (7.12 ± 0.13 ± 0.22) × 10 - 5, respectively. We have also extracted the a 0 (980) mass and its couplings to η π 0, K + K -, and to the φ{symbol} meson from the fit of the η π 0 invariant mass distributions using different phenomenological models.
Study of the a(0)(980) meson via the radiative decay phi -> eta pi(0)gamma with the KLOE detector
GORINI, Edoardo;PRIMAVERA, Margherita;
2009-01-01
Abstract
We have studied the φ{symbol} → a 0 (980) γ process with the KLOE detector at the Frascati φ{symbol}-factory DAΦNE by detecting the φ{symbol} → η π 0 γ decays in the final states with η → γ γ and η → π + π - π 0. We have measured the branching ratios for both final states: Br (φ{symbol} → η π 0 γ) = (7.01 ± 0.10 ± 0.20) × 10 - 5 and (7.12 ± 0.13 ± 0.22) × 10 - 5, respectively. We have also extracted the a 0 (980) mass and its couplings to η π 0, K + K -, and to the φ{symbol} meson from the fit of the η π 0 invariant mass distributions using different phenomenological models.File in questo prodotto:
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