Two photon decays of scalar mesons in a covariant quark model

Abstract

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.

25 pages, 2 figures

References in corpus (1)

• Evidence of the PHI(1020)--->ETA+PI0+GAMMA Decay