Scaling exponents and fluctuation strength in high energy collisions

Lianshou, Liu; Fu, J.; Wu, Y. F.

doi:10.1016/s0370-2693(98)01422-1

Cited by 15 publications

(15 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is pointed out that the fractral of final-state multiplicity production for the central Au-Au collision at √ s NN = 200 GeV is self-similar. However, we can also consider that an effective fluctuation strength can be taken as a characteristic quantity for the strength of dynamical fluctuations [26], defined as:…”

Section: Three-dimensional Analysismentioning

confidence: 99%

Scaling properties of multiplicity fluctuations in heavy-ion collisions simulated by AMPT model

et al. 2013

View full text Add to dashboard Cite

Three dimensional, as well as one-and two-dimensional, studies of multiplicity fluctuation are performed using AMPT model to generate central Au-Au collision events at √ sNN = 200 GeV. Two-and three-dimensional normalized factorial moments in rapidity, transverse momentum and azimuthal angle are found to exhibit power-low scaling when partitioning with the same number of bins in each direction, indicating that the fluctuation are isotropic, i.e the fractality is self-similar in multiparticle production of central Au-Au collisions. Further, we measured the parameter ν which it characterizes the intermittency indices derived in particular analysis. It is found that our model result νyϕp t = 1.86 ± 0.07 is larger than ν = 1.304, which is the value of Ginzburg-Landau type of phase transition. We also explored the intermittent or fluctuational dependence on the transverse momentum. The result shows that the intermittency or fluctuation increase rapidly with the increasing of transverse momentum.

show abstract

Section: Three-dimensional Analysismentioning

confidence: 99%

Scaling properties of multiplicity fluctuations in heavy-ion collisions simulated by AMPT model

et al. 2013

View full text Add to dashboard Cite

show abstract

“…A more direct measure of the intermittency strength can be obtained from its connection with (multi)fractality; at first in the framework of a random cascading model like the amodel, and subsequently in a model-independent way, irrespective of any particular hypothesized mechanism of particle production [32]. According to the a-model the strength parameter, a q , is related to D q by a simple relation…”

Section: The Intermittencymentioning

confidence: 99%

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

2011

View full text Add to dashboard Cite

In this paper, we present the intermittency and the erraticity analyses of the distributions of charged particles produced in 28 Si-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. PACS Nos: 25.75.-q, 25.70.Mn, 24.60.KyRésumé : Nous soulignons ici le caractère intermittent et erratique dans l'analyse de la distribution des particules chargées dans les interactions 28 Si-Ag/Br à l'énergie incidente de 14,5 A GeV. Nous comparons les résultats expérimentaux avec une simulation Monte Carlo utilisant le modèle ultra-relativiste de dynamique moléculaire quantique (UrQMD). Les données expérimentales indiquent la présence d'une composante non statistique dans la densité de particules chargées produites. Ni la simulation UrQMD ni la simulation purement statistique n'arrivent à reproduire les données expérimentales. Nous comparons nos résultats avec ceux obtenus dans des mesures similaires lors d'expériences antérieures de collisions noyau-noyau à haute énergie.[Traduit par la Rédaction]

show abstract

“…Moreover, the H = 0.5 scaling reproduces larger φ (2) q than what we obtain for H = 2.5. Comparing with our previous works we find that the present set of self-affine φ Order A direct measure of the intermittency strength, in terms of the intermittency exponents, can be made in the framework of a random cascading model like the α-model [35]. According to this model, the strength parameter α q is defined as…”

Section: Methodology and Resultsmentioning

confidence: 69%

Untitled

Mali¹,

Mukhopadhyay²,

Singh³

2012

Acta Phys. Pol. B

View full text Add to dashboard Cite

The density fluctuation of the final state charged mesons are investigated in terms of two-dimensional scaled factorial moments in 28 Si-Ag/Br interaction at an incident energy of 14.5 GeV per nucleon. The experimental results are compared with a microscopic transport model based on the Ultra-relativistic Quantum Molecular Dynamics (UrQMD). To accommodate the Bose-Einstein type correlation, that dominates the origin of intermittency, an algorithm based on reassigning charges of produced particles has been employed to the UrQMD data. However, our investigation shows that a strong self-affine intermittent behavior in the experiment still cannot be replicated by the simulation. The Hurst exponent is used to account for the experimentally observed anisotropy in the pseudorapidityazimuthal angle plane. The usual power law type of scaling behavior of the factorial moments, typical of intermittency in one dimension, is retrieved only when independent phase-space directions are partitioned unequally. Several issues related to the underlying (multi)fractal structure of the density function are also examined.

show abstract

Scaling exponents and fluctuation strength in high energy collisions

Cited by 15 publications

References 17 publications

Scaling properties of multiplicity fluctuations in heavy-ion collisions simulated by AMPT model

Scaling properties of multiplicity fluctuations in heavy-ion collisions simulated by AMPT model

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

Untitled

Contact Info

Product

Resources

About

Scaling exponents and fluctuation strength in high energy collisions

Cited by 15 publications

References 17 publications

Scaling properties of multiplicity fluctuations in heavy-ion collisions simulated by AMPT model

Scaling properties of multiplicity fluctuations in heavy-ion collisions simulated by AMPT model

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

Untitled

Contact Info

Product

Resources

About

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