8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

BABAR results on meson-photon transition form factors and ISR production of hadrons

12 Aug 2011, 08:30
552 A (Rhode Island Convention Center)

552 A

Rhode Island Convention Center

Parallel contribution Hadron Spectroscopy Hadron Spectroscopy


Dr David Muller (SLAC)


We report on latest results obtained at BABAR studying low energy e+e- annihilation, produced via initial state radiation. Hadronic cross sections are the experimental input for calculation of the muon anomalous magnetic moment, while the study of the final states and intermediate structures with unprecedented accuracy can reveal new states and their properties. In particular, an updated measurement, using the total data set taken by BABAR, of the cross sections for e+e- -> h+h-h'+h'- (where h,h'=pi,K), and of the study of the Y(2175) --> phi f_0(980) resonance, will be presented. In addition, two-photon processes can be studied at e+e- colliders via the reaction e+ e- -> e+ e- gamma gamma(*) -> e+ e- X, providing a suitable environment for hadron spectroscopy and tests of QCD predictions. We report recent measurements of the gamma gamma* -> P transition form factors at large values of momentum transfer, where P is a pseudoscalar meson: pi0, eta, eta', and eta_c.

Primary author

Steven Robertson (High Energy Physics Group-McGill University-Unknown)

Presentation Materials