Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

Recent results on two-photon physics at BABAR

Jul 16, 2009, 11:20 AM
20m
Exhibition room B (Kraków, Poland)

Exhibition room B

Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
QCD in hadronic physics VI. QCD in Hadronic Physics

Speaker

Dr Vladimir DRUZHININ (Budker Institute of Nuclear Physics, Novosibirsk, Russia)

Description

Two-photon processes produced at e+e- colliders via the reaction e+ e- --> e+ e- gamma gamma(*) --> e+ e- X, provide important experimental data for the study of hadronic spectra and testing QCD predictions. We report here on recent results in a number of these channels that are obtained at the PEP-II collider with the BABAR detector. The gamma gamma --> pi0pi0, pi0eta, and etaeta cross sections are measured in the two photon invariant mass range from 2 GeV to 5 GeV using both single tag and no tag techniques. We also present measurements of the photon-meson transition form factors using the single tag technique. The gamma gamma* -> pi0 transition form factor for the momentum transfer range Q2=4-40 GeV2 and the gamma gamma* -> eta_c transition form factor for the range Q2=2-50 GeV2 will be presented.

Primary authors

Prof. Owen Long (University of California, Riverside) Dr Vladimir DRUZHININ (Budker Institute of Nuclear Physics, Novosibirsk, Russia)

Presentation materials