Joint Institute for Nuclear Research Relativistic ... - Index of - JINR
Joint Institute for Nuclear Research Relativistic ... - Index of - JINR
Joint Institute for Nuclear Research Relativistic ... - Index of - JINR
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PSEUDORAPIDITY SPECTRA OF SECONDARY PARTICLES EMITTED IN<br />
THE RELATIVISTIC NUCLEUS-NUCLEUS COLLISIONS<br />
M.K. Suleymanov<br />
COMSATS <strong>Institute</strong> <strong>of</strong> In<strong>for</strong>mation Technology, Islamabad, Pakistan<br />
We discuss new results connected with structure <strong>of</strong> the pseudorapidity spectra <strong>of</strong> charged<br />
relativistic particles with β > 0.7 produced in Si, Au and Pb+Em reactions. The relativistic<br />
nucleus beams were obtained from AGS and SPS machines at energies: 4.0; 11.6; 14.0 and<br />
158 A GeV. The pseudorapidity spectra were analyzed using Fourier trans<strong>for</strong>mation and<br />
maximum entropy methods. The number <strong>of</strong> fast target protons: g-particles are used to fix the<br />
centrality <strong>of</strong> collisions. Both applied methods detected the existing <strong>of</strong> some selected<br />
pseudorapidity values – nontrivial structure. The results coming from the maximum entropy<br />
method are cleaner and com<strong>for</strong>table to use. Meanwhile the method cannot give the<br />
in<strong>for</strong>mation on the errors <strong>for</strong> the selected pseudorapidity values and the width <strong>of</strong> the<br />
maximums corresponding to the selected values. Nevertheless we can say that A number <strong>of</strong><br />
the selected pseudorapidity values depend on energy; it increased from 2 to 4 with energy and<br />
decreased with a number <strong>of</strong> g-particles.<br />
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