Excitation Function of the Longitudinal Expansion in Central Nuclear Collisions

Abstract

Longitudinal hadron spectra from Proton-Proton (pp) and nucleus-nucleus (AA) collisions from $E_{lab}=2$ AGeV to $\sqrt{s}=200$ AGeV are investigated. The widths of the rapidity spectra for various particle species increases monotonously with energy. The present calculation indicates no sign of a step like behaviour as excepted from the Kaon transverse mass systematics. For Pions, the transport simulation is consistent with a Landau type scaling of the rapidity widths, both in central AA reactions and in pp collisions. However, other hadron species do not follow the Landau scaling. The present model predicts a decreasing rapidity width with particle mass for newly produced particles, not supporting a Landau type flow interpretation.

arXiv commentProceedings of the ICPAQGP 05

References in corpus (15)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• Chemical and Thermal Freeze-Out Parameters from 1 to 200 A.GeV
• Strangeness dynamics and transverse pressure in relativistic nucleus-nucleus collisions
• Probing the Phase Boundary between Hadronic Matter and the Quark-Gluon-Plasma in Relativistic Heavy Ion Collisions
• Dynamics of Ultra-Relativistic Nuclear Collisions with Heavy Beams: An Experimental Overview
• Local equilibrium in heavy ion collisions. Microscopic model versus statistical model analysis
• Transverse Activity of Kaons and the Deconfinement Phase Transition in Nucleus--Nucleus Collisions
• On the Early Stage of Nucleus--Nucleus Collisions
• Evidence for nonhadronic degrees of freedom in the transverse mass spectra of kaons from relativistic nucleus-nucleus collisions?
• Landau Hydrodynamics and RHIC Phenomena
• Scanning the phases of QCD with BRAHMS
• Strangeness from 20 AGeV to 158 AGeV
• Chemical freeze-out parameters at RHIC from microscopic model calculations
• Excitation Function of Energy Density and Partonic Degrees of Freedom in Relativistic Heavy Ion Collisions

Cited by in corpus (2)

• Dilepton production in proton-proton and Pb+Pb collisions at sqrt(s_NN)=2.76 TeV
• Separate mass scaling of the widths of the rapidity distributions for mesons and baryons at energies available at the Facility for Antiproton and Ion research