Test of Scalar Meson Structure in $φ$ Radiative Decays

Details Test of Scalar Meson Structure in $φ$ Radiative Decays Test of Scalar Meson Structure in $φ$ Radiative Decays

1992-11-12

arxiv.org/abs/nucl-th/9211008v1

Physics

Nuclear Physics

Nuclear Theory

11 pages, LATEX file (without figures), Talk given at the International Workshop on Flavor and Spin in Hadronic and Electromag

Scientific paper

We show that $\phi$ radiative decays into scalar mesons [$f_0$(975), $a_0$(980)$\equiv S$] can provide important clues on the internal structures of these mesons. Radiative decay widths vary widely: $B.R.=10^{-4}-10^{-6}$ depending on the substructures ($q\bar q$, $qq\bar q\bar q$, $K\bar K$, glueball). Hence, we could discriminate among various models by measuring these widths at future $\phi$ factories. The understanding of these meson structures is valuable not only in hadron spectroscopy but also in nuclear physics in connection with the widely-used but little-understood $\sigma$ meson. We also find that the decay $\phi\rightarrow S\gamma \rightarrow K^0 \bar K^0\gamma$ is not strong enough to pose a significant background problem for studying CP violation via $\phi\rightarrow K^0 \bar K^0$ at the $\phi$ factories.

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