Showing papers by "Francesco Navarria published in 1971"
TL;DR: In this article, the Bologna-CERN neutron missing-mass spectrometer was used to detect the reactions π−p→ n+(X0→ total) and π −p→n+(X 0→total) at 1.6 GeV/c with a branching ratio of 18.5±2.2%.
Abstract: The reactions π−p→ n+(X0→total) and π−p→ n+(X0→neutrals) have been studied at 1.6 GeV/c with the Bologna-CERN neutron missing-mass spectrometer. Both reactions have been detected without the use of visual techniques. The results are: σ(X0→total)=(108±14) μb and σ(X0→neutrals)=(20.0±3.5) μb, giving a branching ratio Γ(X0→neutrals)/Γ(X0→total)=(18.5±2.2)%. The branching ratio for other possible, so far undetected, neutral decay modes of the X0 turns out to be (2.4±1.9)%.
7 citations
TL;DR: In this article, the branching ratio of X0 → γγ was shown to be 1.7 ± 0.4% in a study of the reaction π−p → n(X0 →γγ) at 1.6 GeV/c incident π-momentum.
5 citations
TL;DR: The branching ratioR=Γ(η→π 0γγ)/Γ η→→ total was measured with counter techniques in this paper, where the η-mesons were produced in the reaction π−+p→ n+MM at 0.8 GeV/c.
Abstract: The branching ratioR=Γ(η→neutrals)/Γ(η→total) has been measured with counter techniques. The η-mesons were produced in the reaction π−+p→ n+MM at 0.8 GeV/c. A total of ∼24 000 η-events have been observed. The value found isR=(70.5±0.8)%. The 90% confidence level for the branching ratioR’=Γ(η→π0γγ)/Γη→→ total is found to beR′≦10%.
1 citations