Search for the Δ++ component in the 12C ground state using the 12C(γ,π+p) reaction

✍ Scribed by V.M. Bystritsky; A.I. Fix; I.V. Glavanakov; P. Grabmayr; Yu.F. Krechetov; O.K. Saigushkin; E.N. Schuvalov; A.N. Tabachenko

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 171 KB
• Volume: 705
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(02)00625-5

✦ Synopsis

The differential cross section for the 12 C(γ , π + p) reaction has been measured in the (1232) resonance region at high recoil momenta of the residual nuclear system. The data are analyzed under the assumption that the formation of the π + p pairs may be interpreted as a γ ++ → π + p process which takes place on a ++ preexisting in the target nucleus. Estimates of the ++ momentum distribution ρ ++ (p) = 0.17 fm 3 for a mean momentum p = 300 ± 49 MeV/c as well as the number of isobars per nucleon N = 0.017 were obtained for 12 C.