Recent results on two-photons processes at BaBar

3 Jun 2019, 17:20
20m
Bruno Touschek Auditorium (INFN-LNF, Italy)

Bruno Touschek Auditorium

INFN-LNF, Italy

Via E. Fermi, 40 I-00044 Frascati
Talk Gamma-Gamma Collisions Gamma-Gamma Collisions

Speaker

Peter Lukin (Budker Institute of Nuclear Physics and Novosibirsk State University)

Description

We study process e+e- -> e+e-eta' in the double-tag mode and measure for the first time the gamma gamma -> eta' formfactor
F(Q^2_1,Q^2_2) in the momentum-range 2 < Q^2_1,Q^2_2 < 60 GeV^2. The analysis is based on data with an integrated luminosity
469 fb^-1 collected at the PEP-II e+e- collider with the BABAR detector at center-of-mass energies near 10.6 GeV. The results for the formfactor are compare with the predictions based on pQCD and VMD.

Primary author

Peter Lukin (Budker Institute of Nuclear Physics and Novosibirsk State University)

Presentation materials