Chronology of Milestone Events in Particle Physics - ALSTON 1960
Chronology of Milestone Events in Particle Physics

  Nobel prize to L. W. Alvarez awarded in 1968 "for his decisive contribution to elementary particle physics, in particular the discovery of a large number of resonance states, made possible through his development of the hydrogen bubble chamber technique and data analysis''  


Alston, M.H.; Alvarez, L.W.; Eberhard, P.H.; Good, M.L.; Graziano, W.; Ticho, H.K.; Wojcicki, S.G.;
Resonance in the System
Phys. Rev. Lett. 5 (1960) 520;

Reprinted in
R. N. Cahn and G. Goldhaber, The Experimental Foundations of Particle Physics, Cambridge Univ. Press (1991) 122.
The Physical Review - the First Hundred Years, AIP Press (1995) 873.

A study, based on 141 events, of the energy distribution in the c.m. system of the pions emitted in the reaction K p 0 + using a beam of 1.15 BeV/c K. Peaks were revealed in both the + and spectra at around 285 MeV, such as would be expected from the production of the pions through a quasi-two-body reaction K p Y* where Y* has a mass spectrum peaking at about 1380 MeV. The shape of the calculated mass spectrum for the hypothetical "particle'' Y* shows striking resemblance to the well-known (3/2 3/2) resonance of the p system. Attempts to determine the spin of the Y* from study of various possible anisotropies were inconclusive with the limited statistics. (Science Abstracts, 1961, 3240. S. J. Goldsack).

Accelerator LBL Detectors HBC-15IN

Related references
See also
L. W. Alvarez et al., Phys. Rev. Lett. 2 (1959) 215;
R. K. Adair, Phys. Rev. 100 (1955) 1540;
E. Eisler and R. G. Sachs, Phys. Rev. 72 (1947) 680;
M. Gell-Mann, Phys. Rev. 106 (1957) 1296;
R. H. Capps, Phys. Rev. 119 (1960) 1753;
L. F. Landovitz and B. Margolis, Phys. Rev. Lett. 2 (1959) 318;
R. H. Dalitz and S. F. Tuan, Ann.Phys. 10 (1960) 307;
M. Nauenberg, Phys. Rev. Lett. 2 (1959) 351;
A. Komatsuzawa, R. Sugano, and Y. Nogami, Progr. of Theor. Phys. 21 (1959) 151;
Y. Nogami, Progr. of Theor. Phys. 22 (1959) 25;
D. Amati, A. Stanghellini, and B. Vitale, Nuovo Cim. 13 (1959) 1143;
R. H. Capps and M. Nauenberg, Phys. Rev. 118 (1960) 593;

  K p p o 1.15 GeV (Plab) cs
  K p + o 1.15 GeV (Plab) cs
  K p o + o 1.15 GeV (Plab) cs
  K p + 1.15 GeV (Plab) cs
  K p o + 1.15 GeV (Plab) cs
  K p + 1.15 GeV (Plab) mass, angp, pwa
  K p (1385 P13)+ 1.15 GeV (Plab) angp
  K p (1385 P13) + 1.15 GeV (Plab) angp

Particles studied
  (1385 P13) ex, mass, qn

Record comments
First evidence for the (1385 P13).
  New Comments List of Comments