2003/02/05 by М. Н. Ачасов, M. N. Achasov, K. I. Beloborodov +39 · 62 citations
Physics and Astronomy · #Astrophysics #Collider #Cross section (physics) #Detector #Electron–positron annihilation #Energy (signal processing) #Hadron #Luminosity #Materials science #Meson #Neutrino Physics Research #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Range (aeronautics) #Vector meson dominance #hep-ex
paper · pdf · doi:10.1016/s0370-2693(03)00336-8
published in Physics Letters B 559(3-4), 171-178 (Elsevier BV)
arxiv created 2003/02/05 · openalex publication_date 2003/04/23 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Results of the study of the e+e−→π0γ process with SND detector at VEPP-2M collider in the c.m.s. energy range s=0.60–0.97 GeV are presented. Using 36513 selected events, corresponding to a total integrated luminosity of 3.4 pb−1, the e+e−→π0γ cross section was measured. The energy dependence of the cross section was analyzed in the framework of the vector meson dominance model. The data are well described by a sum of φ,ω,ρ→π0γ decay contributions with measured decay probabilities: Br(ω→π0γ)=(9.34±0.15±0.31)% and Br(ρ0→π0γ)=(5.15±1.16±0.73)×10−4. The ρ–ω relative interference phase is ϕρω=(−10.2±6.5±2.5) degrees.