Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-11-23
Nucl.Phys. A707 (2002) 161-172
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 4 figures. To be published in Nucl. Phys. A
Scientific paper
10.1016/S0375-9474(02)00960-0
We evaluate radiative decays of $\rho$ and $\omega$ going to two neutral mesons, $\pi^{0} \pi^{0}$ and $\pi^{0} \eta$. We use the sequential vector decay mechanisms in addition to chiral loops and $\rho$-$\omega$ mixing. The chiral loops are obtained using elements of $U\chi PT$ successfully applied in the study of meson-meson interactions up to 1.2 GeV. The chiral loops are found very important in the case of the $\rho \to \pi^{0} \pi^{0} \gamma$ decay and small in the other cases. A good agreement with present measurements of $\rho \to \pi^{0} \pi^{0} \gamma$ and $\omega \to \pi^{0} \pi^{0}\gamma$ is obtained and predictions are made for the other decays where the rates obtained are rather small.
Hirenzaki Satoru
Oset Eulogio
Palomar J. E.
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