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Advances in High Energy Physics
Volume 2014 (2014), Article ID 892582, 20 pages
http://dx.doi.org/10.1155/2014/892582
Research Article

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

1Institute of Theoretical Physics, Shanxi University, Taiyuan, Shanxi 030006, China
2Physics Department, Faculty of Science, Sana’a University, P.O. Box 1247, Sana’a, Yemen
3Physics Department, Science & Arts Faculty (Girls Division), Najran University, P.O. Box 1988, Najiran, Saudi Arabia

Received 5 December 2013; Revised 16 February 2014; Accepted 24 February 2014; Published 30 March 2014

Academic Editor: Seog H. Oh

Copyright © 2014 Ya-Qin Gao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.

Abstract

The double-differential production cross sections in interactions of charged pions on targets at high momentums are analyzed by using a multicomponent Erlang distribution which is obtained in the framework of a multisource 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 12 GeV/c measured by the HARP Collaboration. It is found that the source contributions to the mean momentum of charged particles and to the distribution width of particle momentums decrease with 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.