About   Contents   Introduction   Synopsis   Search   Subject Index   Summaries   Texts

ARMENTEROS 1951

Armenteros, R.; Barker, K.H.; Butler, C.C.; Cachon, A.; Chapman, A.H.;
Decay of V Particles
Nature 167 (1951) 501;

Summary
... we can summarize the main results of the present investigations as follows.

(a)

The occurrence of V-tracks in the chamber has again been confirmed.

(b)

Probably not more than 10 per cent of the V-tracks can be explained by processes other than the spontaneous decay of new unstable particles.

(c)

Momentum measurements on fifty-four secondary particles from neutral V-decays have been made and, together with ionization estimates, make it possible to identify with certainty both protons and mesons.

(d)

Assuming that only two particles are produced by the neutral decays, two schemes are suggested to explain the photographs: V^o → p⁺ π^–, with the V^o mass in the range (2,000 - 2,500) ´ m_e, V^o → π⁺ π^– with the V^o mass about 1,000 m_e. The relative frequency of these two processes will be discussed in a later paper, but the evidence is already strong for the existence of two types of V^o-particle.

(e)

Six charged decays have been observed, but no definite conclusion have been reached about the mass of the charged V-particles.

Accelerator COSM Detectors CLOUD

Reactions

	unspec nucleus vee X
	vee p π–
	vee π+ π–
	Λ p π–
	Ko π+ π–

Particles studied

	Λ	ex
	Ko	ex

Record comments
Evidence for the possible existence of the Λ hyperon. First evidence for the K^o meson.

New Comments List of Comments Jacqueline xirqrgkvlx@hotmail.fr About   Contents   Introduction   Synopsis   Search   Subject Index   Summaries   Texts