Speaker
Vladimir Druzhinin
(SLAC)
Description
* Recent results on two-photon physics at BABAR
Two-photon processes, studied at e+e- colliders via the reaction e+ e---> e+ e- gamma gamma* --> e+ e- Pseudoscalar, provide an approach to a number of important QCD tests. We discuss the recent BABAR measurements of gamma gamma* -> pi0 transition and gamma gamma*-> eta_c transition form factors. We also report on a new measurement of the gamma gamma* -> eta and gamma gamma* -> eta' transition form factors for the momentum transfer range Q^2=4-40 GeV^2.
* A study of charmonium produced in two-photon collisions at BaBar
We describe a detailed study of charmonium states produced in two-photon collisions and decaying to K_S K pi and K K pi pi pi0. We present a high statistics measurement of the mass and width of the eta_c(2S) state.
