scholarly journals Azimuthal Distribution in Heavy-Ion Collisions

2020 ◽  
Vol 4 ◽  
pp. 202
Author(s):  
G. Pandis ◽  
S. Das Gupta
Keyword(s):  
Experimental Data ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Recent Experimental Data ◽  
Azimuthal Distribution ◽  
Ion Collisions

We consider recent experimental data on azimuthal distributions of particles seen in heavy-ion collisions at 35 MeV/nucleon and at 50 MeV/nucleon. For 12C on 12C at 50 MeV/nucleon lab energy, the distribution shows features characteristic of flow; for 12C on 197Au experimental data show features characteristic of rotation. For 40Ar on 51V at 35 MeV/nucleon, effects of both flow and rotation are seen. In magnitudes the effects are small. We find that BUU calculations are able to reproduce these results. 

Pseudorapidity distribution of relativistic singly charged particles in heavy-ion collisions at high energy

1999 ◽  
Vol 77 (4) ◽  
pp. 313-318 ◽  
Author(s):  
F -H Liu ◽  
Y A Panebratsev
Keyword(s):  
Experimental Data ◽  
Heavy Ion Collisions ◽  
Charged Particles ◽  
Heavy Ion ◽  
High Energy ◽  
Pseudorapidity Distribution ◽  
Ion Collisions ◽  
Singly Charged

The pseudorapidity distribution of relativistic singly charged particles produced in high-energy heavy-ion collisions is described by the thermalized cylinder picture. The calculated results are in agreement with the experimental data of lead-induced interactions at 158A GeV/c. PACS Nos.:25.75.-q and 25.75.Dw

scholarly journals Viscous Hydrodynamic Model for Relativistic Heavy Ion Collisions

2013 ◽  
Vol 2013 ◽  
pp. 1-25 ◽  
Author(s):  
A. K. Chaudhuri
Keyword(s):  
Experimental Data ◽  
Heavy Ion Collisions ◽  
Initial Conditions ◽  
Heavy Ion ◽  
High Energy ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Viscous Hydrodynamic ◽  
Recent Developments ◽  
Hydrodynamical Modeling

Viscous hydrodynamical modeling of relativistic heavy ion collisions has been highly successful in explaining bulk of the experimental data in RHIC and LHC energy collisions. We briefly review viscous hydrodynamics modeling of high energy nuclear collisions. Basic ingredients of the modeling, the hydrodynamic equations, relaxation equations for dissipative forces, are discussed. Hydrodynamical modeling being a boundary value problem, we discuss the initial conditions, freeze-out process. We also show representative simulation results in comparison with experimental data. We also discuss the recent developments in event-by-event hydrodynamics.

Azimuthal distribution in heavy-ion collisions

1994 ◽  
Vol 49 (1) ◽  
pp. 338-341 ◽  
Author(s):  
G. Pantis ◽  
S. Das Gupta
Keyword(s):  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Azimuthal Distribution ◽  
Ion Collisions

scholarly journals Holography for Heavy-Ion Collisions at LHC and NICA. Results of the last two years

2018 ◽  
Vol 191 ◽  
pp. 05010 ◽  
Author(s):  
Irina Aref’eva
Keyword(s):  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Recent Experimental Data ◽  
Static Properties ◽  
Ion Collisions ◽  
Concise Review ◽  
Holographic Approach ◽  
Total Multiplicity ◽  
And Diffusion

In the previous Quarks 2016 conference I have presented a concise review of description of quark-gluon plasma (QGP) formation in heavy-ion collisions (HIC) within the holographic approach. In particular, I have discussed how to get the total multiplicity and time formation of QGP in HIC that fit the recent experimental data. For this purpose we had to use an anisotropic holographic model. There are also experimental indications that QGP formed in HIC is anisotropic. In this talk I discuss static properties of anisotropic QGP, in particular, phase transition and diffusion coefficients.

scholarly journals Lights and (some) shadows in the comparison among experimental data of heavy ion collisionat Fermi energies and the dynamical model AMD

2019 ◽  
Vol 223 ◽  
pp. 01050
Author(s):  
Silvia Piantelli ◽  
Alessandro Olmi ◽  
Paolo R. Maurenzig ◽  
Akira Ono ◽  
Maurizio Bini ◽  
...  
Keyword(s):  
Experimental Data ◽  
Impact Parameter ◽  
Fermi Energy ◽  
Energy Region ◽  
Heavy Ion Collisions ◽  
Theoretical Models ◽  
Heavy Ion ◽  
Dynamical Model ◽  
Ion Collisions ◽  
The Impact

The simulation of heavy ion collisions in the Fermi energy region is a challenge for the theoretical models; in particular it is difficult to obtain a coherent description in all the impact parameter range and to reproduce all the experimental observables. In this contribution we will show the very good job done by the dynamical model AMD [1] followed by the statistical code GEMINI [2, 3] as an afterburner. The model is able to reproduce the main characteristics of peripheral and semiperipheral collisions, although some discrepancies still persist.

A study of intermittency in heavy-ion collisions at relativistic energies

2014 ◽  
Vol 23 (11) ◽  
pp. 1450075
Author(s):  
M. Mohisin Khan ◽  
Shakeel Ahmad ◽  
N. Ahmad ◽  
M. Irfan
Keyword(s):  
Experimental Data ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Experimental Results ◽  
Factorial Moments ◽  
Ion Collisions ◽  
Statistical Fluctuations ◽  
Anomalous Dimensions

An attempt is made to investigate occurrence of nonstatistical fluctuations in terms of intermittency in 16 O – AgBr interactions at 4.5, 14.5, 60 and 200 A GeV/c. Additionally, mixed and AMPT generated events are also analyzed. Normalized factorial moments, Fq, are calculated and their variations with pseudorapidity resolution, δη, are investigated. Various important parameters like intermittency indices, anomalous dimensions, Renyi dimensions and Levy indices are calculated and interpreted. Comparison of the experimental results with the results obtained for the mixed and AMPT events suggests that the intermittency pattern observed in the experimental data is a manifestation of some dynamical phenomena and not due to statistical fluctuations.

scholarly journals Baryon spectra and antiparticle-to-particle ratios from the improved AMPT model

2018 ◽  
Vol 171 ◽  
pp. 14004 ◽  
Author(s):  
Yuncun He ◽  
Zi-Wei Lin
Keyword(s):  
Experimental Data ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Current Version ◽  
Ion Collisions ◽  
Particle Ratios ◽  
Quark Coalescence ◽  
Baryon Spectra ◽  
Multi Phase ◽  
Phase Transport

The current version of a multi-phase transport (AMPT) model with string melting can reasonably describe the dN/dy yields, pT spectra and anisotropic flows of pions and kaons at low pT in heavy ion collisions at RHIC and LHC energies, although it failed to reproduce the dN/dy and pT spectra of baryons. In this work, we improve the quark coalescence mechanism in AMPT by removing the forced separate number conservations of mesons, baryons and antibaryons in each event. We find that the improved AMPT model can better describe the yields at midrapidity, the pT spectra and elliptic flow of low-pT baryons in comparison with the experimental data. Antiparticle-to-particle ratios of strange baryons are also significantly improved.

scholarly journals Comparative analysis of strange meson production in heavy ion collisions

2021 ◽  
Vol 2103 (1) ◽  
pp. 012134
Author(s):  
V S Borisov ◽  
A Ya Berdnikov ◽  
Ya A Berdnikov ◽  
D O Kotov ◽  
Iu M Mitrankov
Keyword(s):  
Experimental Data ◽  
Heavy Ion Collisions ◽  
Particle Production ◽  
High Energy Physics ◽  
Heavy Ion ◽  
High Energy ◽  
Jet Quenching ◽  
Model Calculations ◽  
Quenching Effect ◽  
Ion Collisions

Abstract The study of deconfinement state of nuclear matter called quark-gluon plasma (QGP) and phase transition of QGP to hadronic gas is the main goal of high energy physics. Some of the important signatures of QGP formation in heavy-ion collisions include strangeness enhancement at intermediate values of the transverse momentum (ρT ) and a jet quenching effect at high ρT values. Nuclear modification factors (RAB ) for light hadrons are used to quantify these effects. The K *0 and φ mesons can serve as a good probes to investigate QGP properties, because these mesons contain (anti)strange quark and its yields can be measured in a wide ρT range. Comparison of experimental data with theoretical model calculations is important for understanding the evolution of heavy-ion collision. One of the most commonly used event generators to describe experimental results of collider experiments is Pythia8. This paper shows, that Pythia8 predicts RAB values of K *0 and φ less than RAB values in experimental data. Consequently, additional (hidden)strange particle production mechanisms are involved.

An investigation of bin–bin correlation by the method of factorial correlator in high-energy heavy ion collisions

2021 ◽  
Author(s):  
Swarnapratim Bhattacharyya ◽  
Alina Tania Neagu ◽  
Elena Firu
Keyword(s):  
Experimental Data ◽  
Power Law ◽  
Experimental Analysis ◽  
Heavy Ion Collisions ◽  
Normal Approximation ◽  
Heavy Ion ◽  
High Energy ◽  
Ion Collisions ◽  
Urqmd Model ◽  
Log Normal

This paper presents a study of bin–bin correlation of the produced shower particles in the pseudo-rapidity space by the method of factorial correlator in [Formula: see text]O-AgBr and [Formula: see text]S-AgBr interactions at 4.5[Formula: see text][Formula: see text]GeV/[Formula: see text]. The correlated moments are found to increase with decreasing bin–bin separation D, following a power law. Strong bin–bin correlation is exhibited by the experimental data. Experimental data also supports the validity of log normal approximation. Experimental analysis has been compared with the results obtained from the analysis of events simulated by UrQMD model.

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