2011/07/19 by 2 Collaboration, F. Archilli, D. Babusci +142
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.48550/arxiv.1107.3782
Contributed paper to the Lepton-Photon 2011 Conference
arxiv created 2011/07/19 · openalex publication_date 2011/07/19 · arxiv updated 2011/07/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The processes e+e-→ e+e-X, with X being either the η meson or π0π0, are studied at DAΦNE, with e+e- beams colliding at √(s)≃1 GeV, below the ϕ resonance peak. The data sample is from an integrated luminosity of 240 pb-1, collected by the KLOE experiment without tagging of the outgoing e+e-. Preliminary results are presented on the observation of the γγ→η process, with both η→π+π-π0 and η→π0π0π0 channels, and the evidence for γγ→π0π0 production at low π0π0 invariant mass.