The decay ${\rho }^0\to {\pi }^{+}+{\pi }^{-}+\gamma$ and the coupling constant g${}_{\rho \sigma \gamma }$

Abstract

The experimental branching ratio for the radiative decay ${\rho }^0\to {\pi }^{+}+{\pi }^{-}+\gamma$ is used to estimate the coupling constant $g_{\rho \sigma \gamma }$ for a set of values of $\sigma$-meson parameters M${}_{\sigma }$ and ${\Gamma }_{\sigma }$. Our results are quite different than the values of this constant used in the literature.

9 pages(RevTex), 5 ps figures

References in corpus (2)

• Insight into the Scalar Mesons from a Lattice Calculation
• A meson-exchange model of the associated photoproduction of vector mesons and N*(1440) resonances

Cited by in corpus (10)

• Scalar sigma meson effects in rho and omega decays into pi0 pi0 gamma
• The coupling constant g${}_{\rho \sigma \gamma }$ as derived from QCD sum rules
• Interference effects in the decay ϕ\to π^{0}π^{0}γand the coupling constant g_{ϕσγ}
• The decay ${\rho }^0\to {\pi }^0{\pi }^0\gamma$ and the role of $\sigma$-meson
• Scalar sigma meson effects in radiative rho^0-meson decays
• VMD, chiral loops, sigma-meson, and omega-rho mixing in omega-->pi^0 pi^0 gamma decay
• The $g_{V\sigma \gamma }$-coupling constants in hadron electrodynamic
• Determination of the $g_{\rho \sigma \gamma }$ coupling constant through the process $\gamma +N\to N+V$ with circularly polarized photons
• A consistent description of rho0 -> pi pi gamma decays including sigma(500) meson effects
• Role of resonances in rho^0 -> pi^+ pi^- gamma