1210.0739 (N. N. Achasov et al.)

f0(980) and a0(980) resonances near γγ\to K^+K^- and
γγ\to K^0\bar K^0 reaction thresholds    [PDF]

N. N. Achasov, G. N. Shestakov

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.

View original: http://arxiv.org/abs/1210.0739