f0(980) and a0(980) resonances near \gamma\gamma\to K^+K^- and   \gamma\gamma\to K^0\bar K^0 reaction thresholds
  High-statistics data on the reactions $\gamma\gamma\to K^+K^-$ and $\gamma\gamma\to K^0\bar K^0$ are the last missing link in investigations of the light scalar mesons $f_0(980)$ and $a_0(980)$ in photon-photon collisions. It is believed that $f_0(980)$ and $a_0(980)$ resonances exhibit their four-quark structure in these reactions in a vary peculiar way. The work estimates the feasibility of measurements of scalar contributions near $\gamma\gamma\to K^+K^-$ and $\gamma\gamma\to K^0\bar K^0$ reaction thresholds at modern colliders. 
N.N. Achasov, G.N. Shestakov
hep-ph hep-ex nucl-th