Garra Ticó, JordiGraugés Pous, EugeniBABAR Collaboration2019-04-052019-04-052009-09-111550-7998https://hdl.handle.net/2445/131639We study the reaction e + e − → e + e − π 0 in the single tag mode and measure the differential cross section d σ / d Q 2 and the γ γ ∗ → π 0 transition form factor in the momentum transfer range from 4 to 40     GeV 2 . At Q 2 > 10     GeV 2 the measured form factor exceeds the asymptotic limit predicted by perturbative QCD. The analysis is based on 442     fb − 1 of integrated luminosity collected at PEP-II with the BABAR detector at e + e − center-of-mass energies near 10.6 GeV.16 p.application/pdfeng(c) American Physical Society, 2009Física de partículesExperimentsParticle physicsExperimentsinfo:eu-repo/semantics/article5777382019-04-05info:eu-repo/semantics/openAccess