Chronology of Milestone Events in Particle Physics - CLARK 1951
Chronology of Milestone Events in Particle Physics

CLARK 1951

Clark, D.; Roberts, A.; Wilson, R.;
Cross Section for the Reaction + deuteron p p and the Spin of the + Meson
Phys. Rev. 83 (1951) 649;

The application of detailed balancing to the determination of the spin of the + meson from the reaction + deuteron p p and its inverse has been suggested by Marshak and Cheston (Rochester, High Energy Conference, December, 1950) and independently by Johnson (private communication). The detailed balancing argument requires the comparison of either differential or total cross sections of both the meson-producing and meson-absorbing reactions at the same energy in the center-of-mass system. The reaction p p + deuteron has been studied for 340 MeV protons by Richman and others. (Cartwright et al., Phys. Rev. 81 (1951) 652; Crawford, Crowe, and Stevenson, Phys. Rev. 82 (1951) 97) The best data are for the differential cross section at 0, and other data are available at 18, 30, and 60. From these data, limits on the angular distribution can be obtained and the total cross section computed. We have now measured the total cross section for the meson-absorbing reaction.
... We conclude that the spin of the + meson is zero. (Extracted from the introductory part of the paper.).

Accelerator ROCH-CYC Detectors COMB

Related references
See also
R. E. Marshak, Rochester High Energy Conference, December (1950);
Cartwright, Richman, M. M. Whitehead, and Wilcox, Phys. Rev. 81 (1951) 652;
S. Tamor and R. E. Marshak, Phys. Rev. 80 (1950) 766;
D. Clark, Phys. Rev. 82 (1951) 97;
W. K. H. Panofsky, R. L. Aamodt, and J. Hadley, Phys. Rev. 82 (1951) 97;
F. S. Crawford, K. Crowe, and M. L. Stevenson, Phys. Rev. 82 (1951) 97;

  + deuteron 2p cs

Particles studied
  + qn

Record comments
Another determination of the spin of the +.
  New Comments List of Comments