1. The physicists involved in the initial experiment were: J.-E. Augustin, A. M. Boyarski, M. Breidenbach, F. Bulos, J. T. Dakin, G. J. Feldman, G. E. Fischer, D. Fryberger, G. Hanson, B. Jean-Marie, R. R. Larsen, V. Luth, H. L. Lynch, D. Lyon, C. C. Morehouse, J. M. Paterson, M. L. Perl, B. Richter, P. Rapidis, R. F. Schwitters, W. M. Tanenbaum, and F. Vannucci of SLAC and G. S. Abrams, D. Briggs, W. Chinowsky, C. W. Friedberg, G. Goldhaber, R. J. Hollebeek, J. A. Kadyk, B. Lulu, F. Pierre, G. H. Trilling, J. S. Whittaker, J. Wiss, and J. E. Zipse of LBL.
2. A discovery of the ψ: Gerson Goldhaber. “Adventures in Experimental Physics” vol. 5, Epsilon, p. 131, Editor, B. Maglich (World Science Education, Princeton, New Jersey, 1976). It is interesting to note here that the earlier observation of J. H. Christenson, et al. [Phys. Rev. Lett. 25, 1523(1970)] showing a broad shoulder in the ψ pair mass, between 3 and 4 GeV/c2, was finally understood (Leon Lederman, unpublished note, December 16, 1974) when the J/ψ discoveries were made.
3. The paper by C. E. Carlson and P. G. O. Freund [Phys. Lett. 39B (1972) 349] talks about a vector meson with “hidden charm” but was not known to us. We found out later that Tom Appelquist and David Politzer had a paper in preparation suggesting “hidden charm” mesons when our discovery was made. [Phys. Rev. Lett. 34(1975)43].
4. First cross section measurements in the 3–5 GeV region at CEA and in the low energy region at Frascati. A. Litke et al., Phys. Rev. Lett. 30 (1973) 507;
5. G. Tarnopolsky et al., Phys. Rev. Lett. 32 (1974) 432;