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

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

1999-03-02

arxiv.org/abs/hep-ph/9903234v1

Phys.Lett.B454:365-368,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 1 figure

Scientific paper

10.1016/S0370-2693(99)00400-1

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 \kappa meson 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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