PHOTON 2019 - International Conference on the Structure and the Interactions of the Photon. Satellite Workshop: Photon Physics and Simulation at Hadron Colliders.

Recent results on two-photons processes at BaBar

3 Jun 2019, 17:20

20m

Bruno Touschek Auditorium (INFN-LNF, Italy)

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.

Presentation materials

BaBar_Lukin_Talk_v2.pdf