Analysis of shower particle pseudorapidity spectra in interactions of relativistic Au and Pb ions with emulsion nuclei

Ali Zaman

doi:10.1088/1674-1137/35/12/003

Chinese Physics C> 2011, Vol. 35> Issue(12) : 1095-1099 DOI: 10.1088/1674-1137/35/12/003

Analysis of shower particle pseudorapidity spectra in interactions of relativistic Au and Pb ions with emulsion nuclei

Ali Zaman

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Abstract：
The pseudorapidity spectra of fast particles (with β > 0.7 ) produced in Au (at 11.6 A GeV) and Pb (at 158 A GeV) induced collisions with emulsion (Em) nuclei contain some visual plateaus and shoulders. The plateau is wider for Pb+Em reactions compared with the Au+Em ones. The existence of a plateau is expected for parton models. The Fourier transformation and maximum entropy methods were used to get additional information about the plateaus. The dependence of the plateaus on the centrality of the collisions was also studied using the number of g-particles to fix centrality. It shows that the maximum entropy method could confirm the existence of the plateau and the shoulder on distributions.

References

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Ali Zaman. Analysis of shower particle pseudorapidity spectra in interactions of relativistic Au and Pb ions with emulsion nuclei[J]. Chinese Physics C, 2011, 35(12): 1095-1099. doi: 10.1088/1674-1137/35/12/003

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Received: 2011-03-28
Revised: 2011-05-24

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沈阳化工大学材料科学与工程学院沈阳 110142

Analysis of shower particle pseudorapidity spectra in interactions of relativistic Au and Pb ions with emulsion nuclei

Ali Zaman

Received Date: 2011-03-28
Accepted Date: 2011-05-24
Available Online: 2011-12-05

Abstract: The pseudorapidity spectra of fast particles (with β > 0.7 ) produced in Au (at 11.6 A GeV) and Pb (at 158 A GeV) induced collisions with emulsion (Em) nuclei contain some visual plateaus and shoulders. The plateau is wider for Pb+Em reactions compared with the Au+Em ones. The existence of a plateau is expected for parton models. The Fourier transformation and maximum entropy methods were used to get additional information about the plateaus. The dependence of the plateaus on the centrality of the collisions was also studied using the number of g-particles to fix centrality. It shows that the maximum entropy method could confirm the existence of the plateau and the shoulder on distributions.