Re-analysis of some bubble chamber data on N N annihilation

الأصل · EN

A re-analysis of some pp and pn data, at rest and in flight, obtained in bubble chamber experiments, is presented. The (π⁺π⁻) and (KₛKₛ) final states for the channels (2π⁻π⁺) and (KₛKₛπ) are investigated. Evidence for a narrow meson resonance structure, cautiously suggested as f₀ (1500), is given. In the (π⁺π⁻) invariant mass distribution from pn annihilations in flight, using the method of difference spectra, a very clear evidence for ρ⁰, f₂(1270) and f₀ (1500) is first time obtained from these data. This re-analysis suggests that the old bubble chamber data can still provide relevant information on the annihilation process in liquid hydrogen and deuterium, and can elucidate controversial aspects of the annihilation mechanism.