Masayuki Nagasaki

Critical Temperature of Nuclear Matter

In order to get some insight into the characteristic behavior of nuclei in the high energy region, the concept of critical temperature of matter is used to investigate fully the particular case of nuclear matter of the alpha particle type, which is composed of equal even number of protons and neutrons, by applying De Boers principle of corresponding states. The result is T/sub c/ approx equal 3 Mev. This method gives also the nucleon density and the nuclear pressure at the critical point, 1/15 nucleons/y/sup 3/, and 1/80 Mev/y/sup 3/, respectively. Discussions of these results are given. (auth)

Fire-Ball Model and High Transverse Momentum Pion and Jet Productions at ISR Energies

The high transverse momentum pion and jet productions in proton-proton collisions are investigated based on the large and small fire-balls presented by the analyses of cosmic ray experiments. Using the hypothesis of the large fire-ball decaying into pions via the small fire-balls we can show satisfactory fits to the ISR data on the two pion correlations and jet structures, as well as the inclusive one pion cross sections, for PT-:::;6 Ge V /c.

Angular Distribution of p-p Scattering at High Energies and Radius of the Hard Core

It is shown that the minimum or break at t = 1.3 (GeV/c)/sup 2/ in the experimental angular distributions for p + p interactions at high energies can be explained by a rather simple distribution of the absorption surrounding a hard core. The Klein- Gordon equation is used. (JFP)