  eta_c(2980) production in gamma-gamma interactions has been detected via its
decays into K0_s K+/- pi-/+, K+ K- K+ K- and K+ K- pi+ pi- in the data taken
with the DELPHI detector at LEP1 and LEP2 energies. The two-photon radiative
width averaged over all observed decay channels is \Gamma_{\gamma\gamma} = 13.9
+/- 2.0 (stat.) +/- 1.4 (syst.) +/- 2.7 (BR) keV. No direct decay channel eta_c
-> pi+ pi- pi+ pi- has been observed. An upper limit $\Gamma_{\gamma\gamma}$ <
5.5 keV at 95% confidence level has been evaluated for this decay mode.

High Energy Physics - Experiment