2001/05/17 by A. Bramòn, A. Bramon, Rafel Escribano +3 · 34 citations
Mathematics · Physics and Astronomy · #Geometry #High-Energy Particle Collisions Research #Mathematics #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Scalar (mathematics) #hep-ex #hep-ph
paper · pdf · doi:10.1016/s0370-2693(01)01007-3
published in Physics Letters B 517(3-4), 345-354 (Elsevier BV) · 17 pages, 4 figures
arxiv created 2001/05/17 · openalex publication_date 2001/10/01 · arxiv updated 2009/11/30 · openalex created_date 2019/06/27 · openalex updated_date 2026/08/05
The complementarity between chiral perturbation theory and the linear sigma model in the scalar channel is exploited to study π0π0 production in ρ and ω radiative decays, where the effects of a low mass scalar resonance σ(500) should manifest. The recently reported data on ρ→π0π0γ seem to require the contribution of a low mass and moderately narrow σ(500). The properties of this controversial state could be fixed by improving the accuracy of these measurements. Data on ω→π0π0γ can also be accommodated in our framework, but are much less sensitive to the σ(500) properties.