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arXiv · hep-ph/9903234

a_0(980) -> gamma gamma and f_0(980) -> gamma gamma: a consistent description

J. L. Lucio Martinez·M. Napsuciale Mendivil
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Abstract

We work out the Linear Sigma Model (LSM) predictions for the 2 gamma decay rates of the a_0(980),f_0(980) mesons under the assumption that they are respectively the I=1 and I=0 members of the bar q q scalar nonet. Agreement with experimental data is achieved provided we include the contribution of a κmeson with mass approx. 900 MeV, and a scalar mixing angle (sigma -f_0 mixing in the {|NS>,|S>} basis) varphi_s approx. -14^\circ, as predicted by the model.

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J. L. Lucio Martinez, M. Napsuciale Mendivil. 1999-03-02. a_0(980) -> gamma gamma and f_0(980) -> gamma gamma: a consistent description. https://doi.org/10.1016/s0370-2693(99)00400-1

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