Pseudorapidity distributions of the produced charged particles in nucleus-nucleus collisions at low energies at the BNL relativistic heavy ion collider

By using the revised Landau hydrodynamic model and taking into account the effect of leading particles, we discuss the pseudorapidity distributions of produced charged particles in high energy heavy-ion collisions. The charged particles resulted from the freeze-out of the matter produced in collisions possess the Gaussian-like rapidity distributions. The leading particles are assumed having the rapidity distributions of the Gaussian form with the normalization constant being equal to the number of participants, which can be figured out in theory. It is found that the results from the revised Landau hydrodynamic model together with the contributions from leading particles are well consistent with the experimental data carried out by BNL-RHIC-PHOBOS Collaboration in different centrality Au + Au collisions at energies of [Formula: see text], 130 and 62.4 GeV , respectively.

Download Full-text

System Size, Energy, and Centrality Dependence of Pseudorapidity Distributions of Charged Particles in Relativistic Heavy-Ion Collisions

Physical Review Letters ◽

10.1103/physrevlett.102.142301 ◽

2009 ◽

Vol 102 (14) ◽

Cited By ~ 34

Author(s):

B. Alver ◽

B. B. Back ◽

M. D. Baker ◽

M. Ballintijn ◽

D. S. Barton ◽

...

Keyword(s):

Heavy Ion Collisions ◽

Charged Particles ◽

System Size ◽

Heavy Ion ◽

Relativistic Heavy Ion Collisions ◽

Centrality Dependence ◽

Ion Collisions ◽

Pseudorapidity Distributions

Download Full-text

A Description of Pseudorapidity Distributions of Charged Particles Produced in Au+Au Collisions at RHIC Energies

Advances in High Energy Physics ◽

10.1155/2018/1369098 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8

Author(s):

Z. J. Jiang ◽

Dongfang Xu ◽

Yan Huang

Keyword(s):

Phase Transition ◽

Heavy Ion Collisions ◽

Charged Particles ◽

Dense Matter ◽

Heavy Ion ◽

High Energy ◽

Low Energy ◽

Ion Collisions ◽

Rapidity Distributions ◽

Pseudorapidity Distributions

In heavy ion collisions, charged particles come from two parts: the hot and dense matter and the leading particles. In this paper, the hot and dense matter is assumed to expand according to the hydrodynamic model including phase transition and decouples into particles via the prescription of Cooper-Frye. The leading particles are as usual supposed to have Gaussian rapidity distributions with the number equaling that of participants. The investigations of this paper show that, unlike low energy situations, the leading particles are essential in describing the pseudorapidity distributions of charged particles produced in high energy heavy ion collisions. This might be due to the different transparencies of nuclei at different energies.

Download Full-text

CENTRAL RAPIDITY DENSITIES OF CHARGED PARTICLES AT RHIC AND LHC

International Journal of Modern Physics A ◽

10.1142/s0217751x00000823 ◽

2000 ◽

Vol 15 (14) ◽

pp. 2019-2051 ◽

Cited By ~ 58

Author(s):

N. ARMESTO ◽

C. PAJARES

Keyword(s):

Large Hadron Collider ◽

Hadron Collider ◽

Charged Particles ◽

Heavy Ion ◽

Physical Basis ◽

Relativistic Heavy Ion Collider ◽

Central Collisions ◽

Central Rapidity

Predictions on central rapidity densities of charged particles at energies of the relativistic heavy ion collider and the large hadron collider, for central collisions between the largest nuclei that will be available at these accelerators, are reviewed. Differences among the results of the existing models are discussed in relation with their underlying physical basis and with the possibilities to discriminate them.

Download Full-text

Speed of Sound Parameter from RHIC and LHC Heavy-Ion Data

Advances in High Energy Physics ◽

10.1155/2013/450247 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 9

Author(s):

Li-Na Gao ◽

Ya-Hui Chen ◽

Hua-Rong Wei ◽

Fu-Hu Liu

Keyword(s):

Experimental Data ◽

Charged Particle ◽

Speed Of Sound ◽

Hydrodynamic Model ◽

Center Of Mass ◽

Charged Particles ◽

Heavy Ion ◽

Pseudorapidity Distributions ◽

Spectator Model

In framework of combing the participant-spectator model and the Landau hydrodynamic model, the pseudorapidity distributions of charged particles produced in heavy-ion (or nucleus-nucleus) collisions at RHIC and LHC energies are described by a modified Landau hydrodynamic model, where the Landau hydrodynamic model is applied to the target/projectile spectators and the target/projectile participants, respectively. The modeling results are in agreement with the PHOBOS and ALICE experimental data. Then, the values of square speed of sound (cs2) for the participants and spectators can be obtained from the widths of charged particle pseudorapidity distributions. Some features ofcs2for different centralities and center-of-mass energies are obtained too.

Download Full-text

CHARACTERISTICS OF RELATIVISTIC CHARGED PARTICLES PRODUCED IN 24Mg–EMULSION INTERACTIONS AT 4.5A GeV/C

International Journal of Modern Physics E ◽

10.1142/s021830130100040x ◽

2001 ◽

Vol 10 (01) ◽

pp. 55-68 ◽

Cited By ~ 6

Author(s):

N. N. ABD ALLAH ◽

S. A. H. ABOU-STEIT ◽

M. MOHERY ◽

S. S. ABDEL-AZIZ

Keyword(s):

Charged Particles ◽

Heavy Ion ◽

Scaling Behavior ◽

Final State ◽

Azimuthal Correlations ◽

Ion Interactions ◽

Multiplicity Distributions ◽

Pseudorapidity Distributions ◽

Relativistic Particles

The interactions of 4.5A GeV/c 24 Mg nuclei with emulsion have been studied. The multiplicity distributions of all the produced target protons from 24 Mg –emulsion interactions has been found to obey the KNO scaling behavior. The angular characteristics of the relativistic charged particles have been investigated and their dependence on the multiplicity of the relativistic shower particles has been studied. The results reveal that increasing the multiplicity of the shower particles, leads to a shift of the peak of the pseudorapidity distributions towards the lower values of the pseudorapidity and also to a decrease of the average pseudorapidity. The study of the rapidity dispersion of the relativistic charged particles shows that the clusterization effect is significant among the final state of the relativistic particles produced in the heavy-ion interactions. Azimuthal correlations in the angles of the relativistic charged particles have been investigated.

Download Full-text