f0(980) and a0(980) resonances near \gamma\gamma\to K^+K^- and \gamma\gamma\to K^0\bar K^0 reaction thresholds

Abstract

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.

Comments: 3 pages, 1 figure, accepted in JETP Letters