Double-Differential Production Cross Sections of Charged Pions in Charged Pion Induced Nuclear Reactions at High Momentums

摘要

The double-differential π~± production cross sections in interactions of charged pions on targets at high momentums are analyzed by using amulticomponent Erlang distribution which is obtained in the framework of amultisource thermal model. The calculated results are compared and found to be in agreement with the experimental data at the incident momentums of 3, 5, 8, and 12GeV/c measured by the HARP Collaboration. It is found that the source contributions to themeanmomentumof charged particles and to the distributionwidth of particlemomentums decreasewith increase of the emission angle, and the source number and temperature do not show an obvious dependence on the emission angle of the considered particle.