scholarly journals Improved single-particle phase-space distributions for viscous fluid dynamic models of relativistic heavy ion collisions

2020 ◽  
Vol 102 (1) ◽  
Author(s):  
Mridula Damodaran ◽  
Denes Molnar ◽  
Gergely Gábor Barnaföldi ◽  
Dániel Berényi ◽  
Máté Ferenc Nagy-Egri
Keyword(s):  
Phase Space ◽  
Viscous Fluid ◽  
Single Particle ◽  
Dynamic Models ◽  
Fluid Dynamic ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Particle Phase ◽  
Ion Collisions ◽  
Particle Phase Space

POPULATION OF MULTI-QUARK STATES IN EXOTIC MULTIPLETS AND THERMALIZATION IN ULTRA-RELATIVISTIC HEAVY ION COLLISIONS

2008 ◽  
Vol 17 (06) ◽  
pp. 965-1014 ◽  
Author(s):  
STEFAN SCHERER ◽  
MARCUS BLEICHER ◽  
STEPHANE HAUSSLER ◽  
HORST STÖCKER
Keyword(s):  
Phase Space ◽  
Thermal Model ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Recent Discussion ◽  
Ion Collisions ◽  
Model Predictions ◽  
Exotic Hadrons ◽  
Equal Population

The recent discussion about experimental evidence for pentaquark states has revitalized the interest in exotic hadrons. If such states really exist, it is natural to assume that they will be formed at the late hadronization stage of ultra-relativistic heavy ion collisions, given the success of quark recombination models in the description of hadronization. Here, we apply the qMD model to study the formation of color neutral exotic multi-quark clusters at hadronization. We search for color neutral clusters made up of up to six color charges, respectively. We thus obtain estimates for the numbers and phase space distributions of exotic hadronic states produced by clustering in heavy ion collisions, including the members of the pentaquark multiplets. We obtain particle abundances that are smaller than thermal model predictions. Moreover, the results obtained in recombination from ultra-relativistic heavy ion collisions can be compared to the estimates based on equal population of the corresponding multiplets, and to results from fully thermalized systems. We find that the distribution of exotic hadrons from recombination over large multiplets provides a sensitive signal for thermalization and decorrelation of the initial, non-equilibrium state of the collision.

scholarly journals Entropy Analysis in Relativistic Heavy-Ion Collisions

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Shakeel Ahmad ◽  
A. Ahmad ◽  
Anuj Chandra ◽  
M. Zafar ◽  
M. Irfan
Keyword(s):  
Phase Space ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Strong Correlations ◽  
Entropy Analysis ◽  
Multiphase Transport ◽  
Long Range Correlations ◽  
Ion Collisions ◽  
Full Phase Space ◽  
Multiparticle System

Entropy creation in multiparticle system is investigated by analysing the experimental data on ion-ion collisions at AGS and SPS energies and the results thus obtained are compared with those predicted by multiphase transport and correlation-free Monte Carlo models. Entropies produced in limited- and full-phase space are observed to increase with increasing beam energy. The entropy values, normalized to the maximum rapidity and plotted against pseudorapidity (bin width also normalized to the maximum rapidity), are found to be energy independent, exhibiting a kind of entropy scaling. Such scaling is observed in the full phase space as well as in the regions confined to the forward or backward hemispheres. The findings also reveal that there exist strong correlations amongst the particles produced in the forward and backward hemispheres around the midrapidity. These correlations are found to be of short range in nature, and the contributions from the long-range correlations seem to be absent. PACS numbers: 25.75-q, 25.75.Gz.

scholarly journals Net-baryon diffusion in fluid-dynamic simulations of relativistic heavy-ion collisions

2018 ◽  
Vol 98 (3) ◽  
Author(s):  
Gabriel S. Denicol ◽  
Charles Gale ◽  
Sangyong Jeon ◽  
Akihiko Monnai ◽  
Björn Schenke ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Fluid Dynamic ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Dynamic Simulations ◽  
Ion Collisions

scholarly journals PION AND QUARK ANNIHILATION MECHANISMS OF DILEPTON PRODUCTION IN RELATIVISTIC HEAVY ION COLLISIONS

2005 ◽  
Vol 20 (27) ◽  
pp. 2047-2055 ◽  
Author(s):  
D. ANCHISHKIN ◽  
R. NARYSHKIN
Keyword(s):  
Phase Space ◽  
Finite Volume ◽  
Finite Time ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Specific Model ◽  
Relativistic Heavy Ion Collisions ◽  
Dilepton Production ◽  
Main Assumption ◽  
Ion Collisions

The medium-induced modifications of the π+π- and [Formula: see text] annihilation mechanisms of dilepton production during relativistic heavy-ion collisions are considered in the frame of a specific model. The main assumption of the model: the pions (quarks) produced during a collision are effectively confined to a finite volume due to the dense hadron environment, in which they live for a finite time scaled as the lifetime of a fireball. The effect of the contraction of the phase space of the annihilating pion (quark) states on dilepton spectra is analyzed.

KAON PRODUCTION IN RELATIVISTIC HEAVY-ION COLLISIONS: THE ROLE OF THE ELEMENTARY CROSS SECTION

1988 ◽  
Vol 03 (03) ◽  
pp. 251-256 ◽  
Author(s):  
WINFRIED ZWERMANN
Keyword(s):  
Phase Space ◽  
Cross Section ◽  
Production Cross ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Crucial Importance ◽  
Multiple Collision ◽  
Kaon Production ◽  
Ion Collisions

We investigate kaon production in relativistic heavy-ion reactions by use of a multiple collision approach. We clarify the crucial importance of the elementary kaon production cross section and show that with an appropriate parametrization suggested by phase space considerations, the data for 2.1 GeV/nucleon, Ne+NaF, can be reproduced without the need of kaon rescattering.

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