Graugés Pous, EugeniGarra Ticó, JordiBABAR Collaboration2018-09-252018-09-2520101550-7998https://hdl.handle.net/2445/124809We study the reaction e+e- --> e+e- eta_c, eta_c --> K_S K+- pi-+ and obtain eta_c mass and width values 2982.2+-0.4+-1.6 MeV/c^2 and 31.7+-1.2+-0.8 MeV, respectively. We find Gamma(eta_c --> gamma gamma)B(eta_c --> K anti-K pi)=0.374+-0.009+-0.031 keV, and measure the gamma gamma* --> eta_c transition form factor in the momentum transfer range from 2 to 50 GeV^2. The analysis is based on 469 fb-1 of integrated luminosity collected at PEP-II with the BABAR detector at e+e- center-of-mass energies near 10.6 GeV.18 p.application/pdfeng(c) American Physical Society, 2010HadronsMesons (Física nuclear)HadronsMesons (Nuclear physics)info:eu-repo/semantics/article6019382018-09-25info:eu-repo/semantics/openAccess