Two photon decays of scalar mesons in a covariant quark model

Details Two photon decays of scalar mesons in a covariant quark model Two photon decays of scalar mesons in a covariant quark model

1999-04-15

arxiv.org/abs/hep-ph/9904339v1

Int.J.Mod.Phys. A15 (2000) 65-80

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 2 figures

Scientific paper

10.1142/S0217751X00000045

Two photon decay widths of the $J^P = O^+$ scalar mesons $a_{0} (980)$, $f_{0}(980)$, $f_{0}(1370)$ and $\chi_{c0}$ are calculated in a covariant model which is characterized by the quark - antiquark structure. Previously such models were used to calculate current form factors. Here a different application is tried. A simple version of the model uses adjusted nonrelativistic model parameters with small quark masses. The results seem to prefer nonideal mixing of $f_0(980)$ and $f_0(1370)$. The calculated decay rate of $\chi_{c0}$ agrees with the experimental results.

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