Method for Distinguishing between Multiparticle Production Models

Abstract

Phys. Rev. P73, 975 (1968).The idea that qualitative and quantitative differences between different classes of models for elementary-particle production in single-particle inclusive reactions will emerge from studies of reactions on nuclei has been put forward many times. 1 " 3 In this note we contrast the results of realistic calculation of production processes on nuclei to show what experiments can differentiate between models of the elementary production process, and to comment on the (sparse) data now available in this area.In general, current models for multiparticle production can be divided into "coherent-production models" (CPM) (here we might include 4 fragmentation, nova, and diffraction-dissociation models), in which the final state arises from the decay of a long-lived intermediate excitation, and the

Cosmic ray results on the A dependence of multiplicity and angular distributions in proton nuclear interactions above 100 GeV

“…The most obvious theoretical models, e.g., wherein each secondary may independently initiate a secondary cascade, predict much too rapid a rise in (n c) with A. A coherent production model gives closer agreement with the data [6], however, p-p bubble chamber data suggest that only a minority, "20% of the inelastic interaction, proceeds through this (diffraction or fragmentation) channel [20,21 ]. The best fit seems to be to the Energy Flux Cascade model of Gottfried [4], as indicated in fig.…”

“…Two separate sets of data of the same sort were taken with a carbon target [2,3] ; the definitive set included 355 target interactions. The nucleus may be considered to be a microscopic laboratory for investigations of the space-time development of the final state of a proton-nucleon interaction [4][5][6][7][8][9][10]. Thus, exploration of the variation of inclusive parameters of proton-nuclear collisions as functions of nuclear mass number and energy might elucidate various theoretical models of the nucleon-nucleon interaction.…”

“…[16][17][18][19]. The two lines are theoretical predictions from the Energy Flux Cascade Model of Gottfried [4] and the Coherent Production Model of Fishbane and Tref'fl [6]. The carbon point is represented by a separate symbol as that data was analyzed somewhat differently.…”