Radiative decay of rho^0 and phi mesons in a chiral unitary approach

Abstract

We study the rho^0 and phi decays into pi^+ pi^- gamma, pi^0 pi^0 gamma and phi into pi^0 eta gamma using a chiral unitary approach to deal with the final state interaction of the M M system. The final state interaction modifies only moderately the large momenta tail of the photon spectrum of the rho^0 --> pi^+ pi^- gamma decay. In the case of phi decay the contribution to pi^+ pi^- gamma and pi^0 pi^0 gamma decay proceeds via kaonic loops and gives a distribution of pi pi invariant masses in which the f_0(980) resonance shows up with a very distinct peak. The spectrum found for phi --> pi^0 pi^0 gamma decay agrees with the recent experimental results obtained at Novosibirsk. The branching ratio for phi --> pi^0 eta gamma, dominated by the a_0(980), is also in agreement with recent Novosibirsk results.

14 pages, 3 figures. Revised version using an antisymmetric tensor notation for the vector mesons. To appear in Physics Letters B

References in corpus (13)

• Chiral Symmetry Amplitudes in the S-Wave Isoscalar and Isovector Channels and the σ, f_0(980), a_0(980) Scalar Mesons
• Chiral symmetry amplitudes in the s-wave isoscalar and isovector channels and the $\sigma ,f_0(980),a_0(980)$ scalar mesons
• Meson-Meson interaction in a non-perturbative chiral approach
• Scalar Mesons in $\varphi$ Radiative Decay: their implications for spectroscopy and for studies of CP-violation at $\varphi$ factories
• KK bar scattering amplitude to one loop in chiral perturbation theory, its unitarization and pion form factors
• First Observation of PHI(1020)--->PI0+PI0+GAMMA Decay
• Production of scalar $K\bar{K}$ molecules in $\varphi$ radiative decays
• Evidence of the PHI(1020)--->ETA+PI0+GAMMA Decay
• The phi --> gamma K0 bar(K0) Decay
• The interference in the reaction $e^{+}{e}^{-}\to \gamma {\pi }^{+}{\pi }^{-}$ and the search for the decay $\varphi \to \gamma f_0\to \gamma {\pi }^{+}{\pi }^{-}$
• The decay ${\rho }^0\to {\pi }^{+}{\pi }^{-}\gamma$ and the chiral invariant interactions of vector mesons
• Photoproduction of scalar mesons on protons and nuclei
• Search for rare Phi decays in pi+ pi_ gamma final state

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