Comparing Multicomponent Erlang Distribution and Lévy Distribution of Particle Transverse Momentums

• Main Authors: Hua-Rong Wei, Ya-Hui Chen, Li-Na Gao, Fu-Hu Liu
• Format: Article
• Language: English
• Published: Hindawi Limited 2014-01-01
• Series: Advances in High Energy Physics
• Online Access: http://dx.doi.org/10.1155/2014/782631

The transverse momentum spectrums of final-state products produced in nucleus-nucleus and proton-proton collisions at different center-of-mass energies are analyzed by using a multicomponent Erlang distribution and the Lévy distribution. The results calculated by the two models are found in most cases to be in agreement with experimental data from the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). The multicomponent Erlang distribution that resulted from a multisource thermal model seems to give a better description as compared with the Lévy distribution. The temperature parameters of interacting system corresponding to different types of final-state products are obtained. Light particles correspond to a low temperature emission, and heavy particles correspond to a high temperature emission. Extracted temperature from central collisions is higher than that from peripheral collisions.