Intermittency and erraticity of charged particles produced in 28Si-Ag/Br interaction at 14.5 A GeV

2011 ◽  
Vol 89 (9) ◽  
pp. 949-960 ◽  
Author(s):  
Provash Mali ◽  
Amitabha Mukhopadhyay ◽  
Gurmukh Singh
Keyword(s):  
Experimental Data ◽  
Incident Energy ◽  
Particle Density ◽  
Relativistic Quantum ◽  
Charged Particles ◽  
Statistical Simulation ◽  
High Energy ◽  
Quantum Molecular Dynamics ◽  
Urqmd Model ◽  
Charged Particle Density

In this paper, we present the intermittency and the erraticity analyses of the distributions of charged particles produced in 28Si-Ag/Br interaction at incident energy 14.5 A GeV. The experimental results are compared with a Monte Carlo simulation using ultra-relativistic quantum molecular dynamics (UrQMD) model. The experimental data show the presence of a nonstatistical component in the produced charged-particle density. Neither the UrQMD simulation nor the purely statistical simulation was found to match the experimental data. The present set of results are compared to those obtained in similar measurements from earlier high-energy nucleus–nucleus experiments.

CENTRAL CARBON–CARBON COLLISIONS AT 4.2 A GeV/c AND NEAREST-NEIGHBOR SPACING DISTRIBUTIONS

2012 ◽  
Vol 27 (16) ◽  
pp. 1250090 ◽  
Author(s):  
Z. WAZIR ◽  
M. FAKHAR-E-ALAM ◽  
S. A. KHAN ◽  
M. A. RAFIH AMER
Keyword(s):  
Nearest Neighbor ◽  
Matrix Theory ◽  
Relativistic Quantum ◽  
Charged Particles ◽  
Simulated Data ◽  
Quantum Molecular Dynamics ◽  
Primary Level ◽  
Central Collisions ◽  
Urqmd Model ◽  
Central Carbon

The obtained experimental results due to nearest-neighbor spacing distributions were compared with simulated data using random matrix theory (RMT) with aid of the ultra relativistic quantum molecular dynamics (UrQMD) model. The present assessment reveals the primary level of multiplicity of secondary charged particles which might be linked with the onset of region of central collisions based on mentioned results. The author tried to demonstrate the importance of the nearest-neighbor distributions for various multiplicities to detect the region of central collisions.

MULTIFRACTAL ANALYSIS OF CHARGED PARTICLE DISTRIBUTION IN 28Si-Ag/Br INTERACTION AT 14.5A GeV

Fractals ◽  
2012 ◽  
Vol 20 (03n04) ◽  
pp. 203-215 ◽  
Author(s):  
P. MALI ◽  
A. MUKHOPADHYAY ◽  
G. SINGH
Keyword(s):  
Charged Particle ◽  
Particle Production ◽  
Transport Model ◽  
Particle Density ◽  
Relativistic Quantum ◽  
Quantitative Difference ◽  
Quantum Molecular Dynamics ◽  
Particle Density Distribution ◽  
Charged Particle Density ◽  
Self Similar

The multifractal structure of one dimensional charged particle density distribution in 28 Si-Ag / Br interactions at 14.5 GeV per nucleon is investigated by using two different techniques. The experimental measurements are compared with a microscopic transport model of particle production based on the Ultra-relativistic Quantum Molecular Dynamics (UrQMD). Various parameters related to multifractality, for example the Lévy's index, are obtained. Our analysis shows that multifractal structure is present both in the experiment as well as in the simulation. As far as the self-similar nature of the density fluctuation is concerned, there exists, however, a small but definite quantitative difference between the two.

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 EXPERIENCE OF OBTAINING THE PLAN OF EXPERIMENTS, WITH USING MODELS OF INTERACTION OF CHARGED PARTICLES

2017 ◽  
Vol 2 ◽  
pp. 47
Author(s):  
Normunds Kante ◽  
Juris Lavedels ◽  
N. Kriščuks
Keyword(s):  
Charged Particle ◽  
Particle Density ◽  
Dimensional Space ◽  
Charged Particles ◽  
Multidimensional Space ◽  
Two Dimensional ◽  
Infinite Space ◽  
Surface Models ◽  
Charged Particle Density

In this article a method of obtaining an experiment plan in a fragment of multidimensional space is analyzed and improved. The method is based on an assumption that particles will distribute evenly in an infinite space with constant charged particle density. To obtain the experiment plan, the infinite multidimensional space is replaced with a hypercube whose surface models influence of the surrounding infinite space. Software is developed and practical results in obtaining experiment plan in two-dimensional space are acquired. Two-dimensional space allows developing of a methodology and algorithm for obtaining experiment plan while providing a simple visualization of the solution. Acquired results in two-dimensional space give an opportunity to create methods for obtaining experiment plan in a hypercube of multidimensional space.

Production of negatively charged particles in nucleus–nucleus collisions at 200A GeV

2002 ◽  
Vol 80 (5) ◽  
pp. 525-532
Author(s):  
F -H Liu
Keyword(s):  
Experimental Data ◽  
Transverse Momentum ◽  
Charged Particles ◽  
High Energy ◽  
Momentum Distributions

Three isotropic emission fireballs are used to describe the rapidity (or pseudorapidity) and transverse momentum distributions of negatively charged particles produced in nucleus–nucleus collisions at high energy. The calculated results are compared and shown to be in agreement with the experimental data of 16O–Au, 32S–S, and 32S–Ag collisions at 200A GeV. PACS Nos.: 25.75-q, 24.10Pa

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.

Comparison study of the pT distributions of the charged particles in p–Pb interactions at LHC energies

2017 ◽  
Vol 32 (31) ◽  
pp. 1750167 ◽  
Author(s):  
Y. Ali ◽  
U. Tabassam ◽  
M. Suleymanov ◽  
A. S. Bhatti
Keyword(s):  
Transverse Momentum ◽  
Transport Model ◽  
Relativistic Quantum ◽  
Charged Particles ◽  
Medium Effect ◽  
Quantum Molecular Dynamics ◽  
Essential Difference ◽  
Momentum Range ◽  
Cronin Effect ◽  
Model Predictions

Transverse momentum [Formula: see text] distributions of primary charged particles were compared to simulations using the Ultra Relativistic Quantum Molecular Dynamics (UrQMD) transport model and the HIJING 1.0 model in minimum bias p–Pb collisions at [Formula: see text] in the pseudorapidity [Formula: see text] regions: [Formula: see text], [Formula: see text] and [Formula: see text] and in the transverse momentum range [Formula: see text]. The simulated distributions were then compared with the ALICE data and it was observed that UrQMD predicts systematically higher yields than HIJING 1.0. Both codes cannot describe the experimental data in the range of [Formula: see text], though in the region of [Formula: see text] the model predictions are very close to the experimental results for particles with [Formula: see text], [Formula: see text]. The ratio of the yield at forward pseudorapidity to that at [Formula: see text] was also studied. It was observed that the predictions of the models depend on [Formula: see text]. In the experiment there is no essential difference of yields for particles from the intervals of [Formula: see text], [Formula: see text] and [Formula: see text]. The differences are significant for the models where the ratios are systematically less than 1. This means that the results are not connected to a medium effect but reflect the Cronin effect. We are led to conclude that the codes cannot take into account satisfactorily the leading effect due to the asymmetric p–Pb fragmentation.

Multifractal analysis of charged particle distributions using horizontal visibility graph and sandbox algorithm

2017 ◽  
Vol 32 (08) ◽  
pp. 1750024 ◽  
Author(s):  
P. Mali ◽  
A. Mukhopadhyay ◽  
S. K. Manna ◽  
P. K. Haldar ◽  
G. Singh
Keyword(s):  
Model Simulation ◽  
Relativistic Quantum ◽  
Monte Carlo Model ◽  
High Energy ◽  
Quantum Molecular Dynamics ◽  
Network Systems ◽  
Emission Data ◽  
Horizontal Visibility ◽  
Particle Distributions ◽  
200 Gev

Horizontal visibility graphs (HVGs) and the sandbox (SB) algorithm usually applied for multifractal characterization of complex network systems that are converted from time series measurements, are used to characterize the fluctuations in pseudorapidity densities of singly charged particles produced in high-energy nucleus–nucleus collisions. Besides obtaining the degree distribution associated with event-wise pseudorapidity distributions, the common set of observables, typical of any multifractality measurement, are studied in [Formula: see text]O-Ag/Br and [Formula: see text]S-Ag/Br interactions, each at an incident laboratory energy of 200 GeV/nucleon. For a better understanding, we systematically compare the experiment with a Monte Carlo model simulation based on the Ultra-relativistic Quantum Molecular Dynamics (UrQMD). Our results suggest that the HVG-SB technique is an efficient tool that can characterize multifractality in multiparticle emission data, and in some cases, it is even superior to other methods more commonly used in this regard.

Study of multiplicity correlations in nucleus–nucleus interactions at high energy

2015 ◽  
Vol 24 (06) ◽  
pp. 1550048 ◽  
Author(s):  
M. Mohery ◽  
E. M. Sultan ◽  
Shadiah S. Baz
Keyword(s):  
Experimental Data ◽  
Strong Correlation ◽  
Multiplicity Distribution ◽  
Charged Particles ◽  
High Energy ◽  
The Other ◽  
Heavy Particles ◽  
Projectile Nucleus ◽  
Compound Multiplicity ◽  
Experimental Values

In the present paper, some results on the correlations of the nucleus–nucleus interactions, at high energy, between different particle multiplicities are reported. The correlations between the multiplicities of the different charged particles emitted in the interactions of 22 Ne and 28 Si nuclei with emulsion at (4.1–4.5)A GeV/c have been studied. The correlations of the compound multiplicity nc, defined as the sum of both numbers of the shower particles ns and grey particles ng, have been investigated. The experimental data have been compared with the corresponding theoretical ones, calculated according to the modified cascade evaporation model (MCEM). An agreement has already been fairly obtained between the experimental values and the calculated ones. The dependence of the average compound multiplicity, on the numbers of shower, grey, black and heavy particles is obvious and the values of the slope have been found to be independent of the projectile nucleus. On the other hand, the variation of the average shower, grey, black and heavy particles is found to increase linearly with the compound particles. A strong correlation has been observed between the number of produced shower particles and the number of compound particles. Moreover, the value of the average compound multiplicity is found to increase with the increase of the projectile mass. Finally, an attempt has also been made to study the scaling of the compound multiplicity distribution showing that the compound multiplicity distribution is nearly consistent with the KNO scaling behavior.

Study of extensive air showers at Mount Norikura. III. Core structure and high-energy events

1968 ◽  
Vol 46 (10) ◽  
pp. S25-S29 ◽  
Author(s):  
S. Miyake ◽  
K. Hinotani ◽  
N. Ito ◽  
S. Kino ◽  
H. Sasaki ◽  
...  
Keyword(s):  
Energy Flow ◽  
Particle Density ◽  
High Energy ◽  
Flow Density ◽  
Water Tank ◽  
Air Showers ◽  
Charged Particle Density ◽  
Lateral Density Distribution ◽  
Plastic Scintillators ◽  
Lateral Structure

An area of 3 × 4 m2 is covered by 48 plastic scintillators above and below a water tank 2 m in depth. From maps of the charged-particle density and the energy-flow density in the core region, properties of EAS cores and of the high-energy nucleon component have been studied. About 25% of observed cores show the complicated structure of a "multiple core". These can be understood as due to effects of high-energy nuclear particles having large transverse momenta of several GeV/c to a few tens of GeV/c. The frequency of occurrence of such events increases with the size of EAS only slowly, but it decreases rapidly with increasing distance between the main cores and subcores. There is no clear distinction in the average lateral density distribution of charged particles between these multiple-core EAS and ordinary EAS at points distant from the cores.Comparing the particle density in both layers of detectors (top and bottom), the activity of cores has been studied. This fluctuates more than would be expected from the lateral structure of the showers.

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