Heavy Mesons and Particle Mixture Theory

DOI PDF Open Access

Search this article

Description

The following remarkable results for heavy mesons seem to have been obtained by recent experiments.1l· 2) (i) There is a new resonant state ((-meson) in n-n system.l) The ( meson with isotopic spin T=l and mass m,:::::600 Mev has been observed in the reaction n±+ p~p+n±+n°, but there is no evidence for a (n+n-) peak at 600 Mev. (ii) The apparent two-peak structure in pO(n+n-) has been observed in the p-p annihilation process.2) The masses of the two peaks are mp1 =720±10 Mev, mp,= 780±35 Mev. mp1 is nearly equal to the mass of the well-known n-n resonant state with isotopic spin T=l and spin J=l and mp2 is nearly equal to the mass of w meson. a) Here I should like to suggest a model for the reaction n±+p~N+( and show that the experimental results (containing the results (i) and (ii)) tor heavy mesons can be explain~d to some extent by the particle mixture theory. As to the former problem, there seems to be following interpretation.4l The r; meson is the neutral member of the ( triplet and its mass is lower in the same manner as the n° mass is lower than the n± mass. Although such an interpretation as this may be natural, I should like to suggest the following model by which the result (i) for n±+p~N+(--+N+n+n reaction can easily be explained. The ( meson is produced through the interaction between the incident n± and the virtual w

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top