Models of V-particles

  title={Models of V-particles},
  author={Kazuhiko Nishijima},
  journal={Progress of Theoretical Physics},
  • K. Nishijima
  • Published 1 April 1953
  • Physics
  • Progress of Theoretical Physics
Possible models of V·particles, mainly concerned with VO (V10)·particles, are investigated in a systematic way on the basis of their characteristic features, one being experimental evidences and the other theoretical requirements such as the stability of nuclei and the charge independence. The latters play a role for ruling out a proposed decay mode, VO_p + n+ Y, and the single production of hot VO·particles, respectively. Since ·the pair production of VO-particles seems unfavourable according… 

On the Theory of Hyperons and Heavy Mesons

During the past few years there haa accumulated so much experimental information on hyperons and heavy mesons that some of the many puzzling questions on these strange particles arebeing resolved.

Constructing Strangeness: Exploratory Modeling and Concept Formation

Abstract The notion of exploratory modeling constitutes a powerful heuristic tool for historical-epistemological analysis and especially for studying concept formation. I will show this by means of a



CXIII. The properties of neutral V-particles

Abstract In a cloud-chamber investigation at 2867 m. altitude 70 V-tracks due to the decay of neutral V-particles have been observed. An analysis has been made on the basis of the two-body decay

CXIX. The mean lifetime and frequency of production of charged V-particles

Abstract Data for the determination of the mean lifetime of charged V-particles are discussed, following the procedure outlined by Wilson and Butler (1952). The tracks of twenty-seven V ±-particles

XCVIII. The transverse, momentum spectrum of the decay products of charged V-particles

Abstract The momentum distributions in the centre of mass system for the charged secondary from the two reactions, V ± → µ ±+π 0+v and V ±→ µ ±+v+v, have been calculated. The second of the above

CXXVII. On the decay of charged V-particles

Abstract Among 18 000 photographs taken during an experiment with a large cloud chamber at the Jungfraujoch (3 580 m) 13 examples of the decay of charged V-particles have been observed. A summary of

CIV. Masses and modes of decay of heavy mesons.—Part I. κ-particles

Summary Observations by the photographic method are described which establish the existence of heavy charged mesons, of mass about 1200me , which decay with the emission of a single charged particle.

LXXII. Nuclear interactions of great energy.—Part I. Evidence for the creation of heavy mesons

Summary The masses of charged mesons, produced among the ‘shower’ particles in the nuclear interactions of protons of great energy have been determined by scattering and grain-density measurements.

Slow heavy mesons from cosmic ray stars

Two stars have been observed, iu plates exposed at a maximum altitude of about 90000 feet, showing the ejection of a slow heavy meson which, after being brought to rest in the emulsion, disintegrates

Some Properties of Penetrating Cosmic-Ray Showers and Star Phenomena seen in the Cloud Chamber

Cloud-chamber photographs of cosmic-ray showers containing penetrating particles have been obtained at sea level. The spectrum of the penetrating particles has been measured and a study made of the

LVI. The properties of charged V-particles

Abstract Twenty-one examples of the decay of charged V-particles have been found among 25 000 counter-controlled cloud-chamber photographs obtained on the Pic-du-Midi (2 867 m). These events have

To section 4: It is not certain that the interaction like (4.8) can be treated within the scope of the present field theory

  • Phys. Rev
  • 1953