Transverse Momentum Distributions of Charged Hadrons Produced in He12C Collisions at 4.2A GeV/c

Abstract

We study the trend of transverse momentum (pT) and maximum transverse momentum (pTmax) distributions of pions and protons in He12C-interactions at 4.2A GeV/c. A comparison between theoretical results, from Cascade model (Dubna version), and experimental results, provided by the 2-m propane bubble chamber of JINR, Dubna, is made. Different regions in terms of the trend of pT distributions of the particles are identified: a region where the pT is greater than 0.375 GeV/c is termed as region-III. This region has a maximum value of pT$$\sim $$ 1 and 1.5 GeV/c, respectively, for π -mesons and protons. Here, the protons affect the pT distribution one order more than the mesons and the experimental and Cascade results disagree with each other. In addition, the number of particles detected in the experiments is less than the model, in the region-III. This aimed to establish a correlation between the production of the maxim pT and high-pT region and to comprehend the dynamics of the production of particles with high momentum distribution.