Chronology of Milestone Events in Particle Physics - HINCKS 1948
Chronology of Milestone Events in Particle Physics

HINCKS 1948

Hincks, E.P.; Pontecorvo, B.;
Search for Gamma-Radiation in the 2.2-Microsecond Meson Decay Process
Phys. Rev. 73 (1948) 257;

Reprinted in
Bruno Pontecorvo, Izbrannye trudy, ed. S. M. Bilenkii, Moskva, <> (1997) t.I, s.57.

Motivation
The meson decay process which is identified by a mean life of 2.2 microseconds has been usually thought of as consisting of the emission of an electron and a single neutrino, as suggested by the well-known Yukawa explanation of the ordinary beta-process in nuclei. However, the Yukawa theory is at variance with the results of the experiment of Conversi, Pancini, and Piccioni, and since there remains no strong justification for the electron-neutrino hypothesis, a direct experiment to test an alternative hypothesis - that the decay process consists of the emission of an electron and a photon, each of about 50 MeV has been performed. (Extracted from the introductory part of the paper.).

Accelerator COSM Detectors CNTR

Related references
Analyse data from
N. Nereson and B. Rossi, Phys. Rev. 64 (1942) 199;
M. Conversi and O. Piccioni, Phys. Rev. 70 (1946) 859;
M. Conversi, E. Pancini, and O. Piccioni, Phys. Rev. 71 (1947) 209;
J. A. Wheeler, Phys. Rev. 71 (1947) 320;
C. M. G. Lattes, G. P. S. Occhialini, and C. F. Powell, Nature 160 (1947) 486;
G. Bernardini, B. N. Cacciapuoti, and B. Querzoli, Nuovo Cim. 3 (1946) 349;
C. D. Anderson, R. V. Adams, P. E. Lloyd, and R. R. Rau, Phys. Rev. 72 (1947) 724;
C. M. G. Lattes, G. P. S. Occhialini, and C. F. Powell, Nature 160 (1947) 453;
B. Pontecorvo, Phys. Rev. 72 (1947) 246;

Reactions
  e qnc

Particles studied
  qn
  e qn

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Nonexistence of e decay.
    
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