An investigation of jets based on the fireball model

Abstract

An analysis was made of 227 jets of energy between 1010 eV and several 1014 eV collected from several laboratories. Based on the fireball model, calculation was made of the angular distribution of the secondary particles of the jet in the laboratory system and the dispersion σ, anisotropyD and inelasticityK for each individual jet. It is confirmed thatK varies as l/γc, and the fireball model is compatible with the experimental results in the energy region ofEp= 1012 eV to 1014 eV. The experimental value ofK, however, gives too large a value forEp1012 eV and too small a value in the energy region ofEp> 1014 eV. Also, the value ofD is a little smaller than expected from the fireball model. Based on the experimental result, a process is suggested that, besides the emission and disintegration of fireballs, the contribution of the mesons from the disintegration of the excited nucleon and the direct production of secondary particles due to core-core interaction, plays an important role for the multiple meson production in high-energy interaction.