1. The reaction was proposed byDrell, Lipkin andde Shalit (1) at the Weizmann Institute, Rehovoth, Dec. 1961. The first rough estimation for the cross-section based on the statistical method has been performed byde Shalit (2)et al.Afterward Ericson (3) andJeax (4) in several occasions recalled the importance of such reactions.
2. S. D. Drell, H. J. Lipkin andA. de Shalit: unpublished; S. D. DRFll:Seminar at Saclay (1962).
3. C. Noack andA. de Shalit: private communication.
4. T. Ericson :Intern. Gonf. on High-Energy Physics and Nuclear Structure (CERN 63, 28 July 1963), p. 68.
5. M. Jean:Suppl. Nuovo Cimento,2, 400 (1964).