Evidence of Entropy Scaling in Relativistic Nucleus–nucleus Collisions

Khan, M. Mohisin; Ahmad, N.; Azmi, M. D.; Bari, W.; Khan, Alamgir; Haque, Mohammad Imdadul; Zafar, M.; Irfan, M.

doi:10.1142/s0218301312500681

Cited by 5 publications

(6 citation statements)

References 17 publications

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“…These findings are, thus, in fine agreement with those reported earlier [16] for hh collisions in the energy range from ∼2 GeV to a few TeV. In AA collisions too, entropy has been observed by Khan et al [21] to increase with increasing beam energy. It has been reported [16] that for hh collisions in the energy range of ∼22 to 900 GeV, total entropy produced in a limited pseudorapidity bin, when normalized to maximum rapidity in the centre-of-mass frame, is found to be essentially independent of the energy and identity of the colliding hadrons, indicating, thereby, the presence of a kind of entropy scaling.…”

Section: Resultssupporting

confidence: 93%

“…Such a scaling of entropy has also been observed by Mizoguchi and Biajima [17] in pp collisions at cms energy range, 0.2-7 TeV. In case of AA collisions too, a similar scaling behaviour has been observed by Khan et al [21] in 4.5 and 14.5A GeV/c 28 Si-nucleus collisions and also by Ghosh et al [20] in 60A GeV/c 16 O-AgBr and 200A GeV/c 32 S-AgBr collisions. An attempt is, therefore, made to examine the occurrence of entropy scaling with the present data that would definitely cover a significant energy range (AGS and SPS).…”

Section: Resultssupporting

confidence: 80%

“…Such scaling has also been observed in pp collisions at LHC energies [17]. For AA collisions, however, only a few attempts have been made [18][19][20][21] to study the entropy production in multiparticle systems. It was, therefore, considered worthwhile to carry out a well-focused study of entropy production and subsequent scaling in AA collisions by analysing the experimental data over a wide range of incident energies.…”

Section: Introductionmentioning

confidence: 64%

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Entropy Analysis in Relativistic Heavy-Ion Collisions

Ahmad

Chandra

et al. 2013

Advances in High Energy Physics

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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.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 64%

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Entropy Analysis in Relativistic Heavy-Ion Collisions

Ahmad

Chandra

et al. 2013

Advances in High Energy Physics

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“…Different workers have investigated the evolution of entropy in high energy nucleus-nucleus collisions at different times [50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66]. The entropy of produced particles can easily be calculated from the multiplicity distribution of the data.…”

Section: Entropy and Fractalitymentioning

confidence: 99%

Multifractal Analysis of Charged Particle Multiplicity Distribution in the Framework of Renyi Entropy

Bhattacharyya

Neagu

Firu

2018

Advances in High Energy Physics

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A study of multifractality and multifractal specific heat has been carried out for the produced shower particles in nuclear emulsion detector for 16 O-AgBr, 28 Si-AgBr, and 32 S-AgBr interactions at 4.5AGeV/c in the framework of Renyi entropy. Experimental results have been compared with the prediction of Ultra-Relativistic Quantum Molecular Dynamics (UrQMD) model. Our analysis reveals the presence of multifractality in the multiparticle production process in high energy nucleus-nucleus interactions. Degree of multifractality is found to be higher for the experimental data and it increases with the increase of projectile mass. The investigation of quark-hadron phase transition in the multiparticle production in 16 O-AgBr, 28 Si-AgBr, and 32 S-AgBr interactions at 4.5 AGeV/c in the framework of Ginzburg-Landau theory from the concept of multifractality has also been presented. Evidence of constant multifractal specific heat has been obtained for both experimental and UrQMD simulated data.

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“…In high-energy nucleus-nucleus collisions, entropy measurement of produced particles can provide important information about the multiparticle production mechanism. Different workers have investigated the evolution of entropy in multiparticle production in various highenergy interactions at different times [1][2][3][4][5][6][7][8][9][10][11]. The entropy of produced particles can easily be calculated from the experimental multiplicity distributions.…”

Section: Introductionmentioning

confidence: 99%

An investigation of Renyi entropy in high-energy nucleus–nucleus collisions

2017

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A study of Renyi entropy of shower particles has been carried out using 16O, 28Si, and 32S projectiles in interaction with AgBr and CNO target present in nuclear emulsion at an incident momentum of 4.5 AGeV/c. The analysis reveals interesting experimental observations for both groups of targets. A comparison of the experimental results with the results obtained from analyzing the event sample generated by the UrQMD code is also presented. Renyi entropy values increase with the increase of projectile mass. This increase is weaker in case of CNO target. The calculated values of second-order Renyi entropy H2 are shown to vary linearly with the logarithm of average particle multiplicity ln⟨n⟩ for both targets. The dependence of Renyi entropy on the logarithm of average particle multiplicity ln⟨n⟩ indicates the presence of long-range correlation in high-energy nucleus–nucleus interactions. The variation is found to be stronger in the case of experimental events in comparison to the UrQMD simulated events indicating stronger long-range correlation for the experimental data.

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Evidence of Entropy Scaling in Relativistic Nucleus–nucleus Collisions

Cited by 5 publications

References 17 publications

Entropy Analysis in Relativistic Heavy-Ion Collisions

Entropy Analysis in Relativistic Heavy-Ion Collisions

Multifractal Analysis of Charged Particle Multiplicity Distribution in the Framework of Renyi Entropy

An investigation of Renyi entropy in high-energy nucleus–nucleus collisions

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