Pseudorapidity spectra of relativistic particles emitted in the Au and Pb induced reactions at high energies

TL;DR

This paper analyzes the pseudorapidity spectra of relativistic charged particles in Au+Em and Pb+Em collisions at high energies, revealing features like plateaus and shoulders consistent with parton models using Fourier and maximum entropy methods.

Contribution

It introduces the combined use of Fourier transformation and maximum entropy methods to analyze pseudorapidity spectra, highlighting structural features in high-energy nuclear collisions.

Findings

Wider plateau observed in Pb+Em reactions.

Existence of plateau and shoulder confirmed by maximum entropy method.

Spectral features align with predictions of parton models.

Abstract

The structure of the pseudorapidity spectra of charged relativistic particles with beta > 0.7 measured in Au+Em and Pb+Em collisions at AGS and SPS energies are analyzed using Fourier transformation method and maximum entropy one. The dependences of these spectra on the number of fast target protons (g-particles) are studied. They show visually some plateau and "shoulder" which are at least three selected points on the distributions. The plateau seems wider in Pb+Em reactions. The existing of plateau is expected for the parton models. The maximum entropy method confirms the existence of the plateau and the shoulder of the distributions.