Energy dependence of the reaction γp→ρ- δ++

J. Ballam*, G. B. Chadwick, A. Levy, M. M. Menke, P. Seyboth, A. Shapira, Y. Eisenberg, B. Haber, E. E. Ronat, Y. Stahl, G. Yekutieli

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The reaction γp→ρ- Δ++ was studied between 4 and 8 GeV using positron-annihilation radiation. Assuming σ Eγ-a we find that a=0.6±0.2. With sufficiently large absorption corrections, a one-pion-exchange model can fit this dependence, but requires a width for ρ→πγ much in excess of the value predicted by SU(3).

Original languageEnglish
Pages (from-to)995-997
Number of pages3
JournalPhysical Review Letters
Issue number16
StatePublished - 1971


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