EMISSION OF RELATIVISTIC HADRONS IN THE BACKWARD HEMISPHERE IN NUCLEAR COLLISIONS.

Autor: Ahmad, N., Ahmad, Shakeel, Khan, M. M., Zafar, M., Irfan, M.
Předmět:
Zdroj: International Journal of Modern Physics E: Nuclear Physics; Sep2005, Vol. 14 Issue 6, p895-907, 13p, 2 Charts, 12 Graphs
Abstrakt: The behavior of the relativistic charged particle multiplicities and the pseudorapidity distributions for 4.5A and 14.5A GeV/c28Si-nucleus interactions are investigated in terms of the number of emitted relativistic hadrons in the backward hemisphere, $n_s^b$ (relativistic charged particles emitted with space angle θs such that θs lies in the interval 90°≤θs≤270°). The η distribution of relativistic charged particles for the interactions with $n_s^b\geq 1$ are found to be quite nicely fitted by a single Gaussian distribution (GD), while it is fitted by two distinct GD's when the interactions are not accompanied by backward relativistic hadrons. This, in turn, suggests that in the production of events having $n_s^b=0$ probably two different mechanisms operate. [ABSTRACT FROM AUTHOR]
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