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    Forward–backward multiplicity correlation in high-energy nucleus–nucleus interactions at a few agev/c

    Bhattacharyya, Swarnapratim, Haiduc, Maria, Neagu, Alina Tania, Firu, Elena
    Journal of Physics G: Nuclear and Particle Physics, 2014, Vol.41(7), p.075106 (14pp) [Peer Reviewed Journal]
    IOPscience (IOP Publishing)
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    Title: Forward–backward multiplicity correlation in high-energy nucleus–nucleus interactions at a few agev/c
    Author: Bhattacharyya, Swarnapratim; Haiduc, Maria; Neagu, Alina Tania; Firu, Elena
    Subject: Texts ; Statistics ; Fluctuation ; Statistical Analysis ; Random Numbers ; Correlation Analysis ; Statistical Methods ; Samples ; Nuclear and High-Energy Physics (General) (So) ; Nuclear and High-Energy Physics (Ah) ; Forward-Backward Multiplicity Correlation ; Dynamical Fluctuations ; Multiparticle Production;
    Description: We have presented a systematic study of two-particle rapidity correlations in terms of investigating the dynamical fluctuation observable in the forward–backward pseudo-rapidity windows by analyzing the experimental data of interactions at 4.5 AGeV/c, interactions at 4.1 AGeV/c, and interactions at 4.5 AGeV/c. The experimental results have been compared with the results obtained from the analysis of event sample simulated (MC-RAND) by generating random numbers and also with the analysis of events generated by the UrQMD and AMPT model. Our study confirms the presence of strong short-range correlations among the produced particles in the forward and the backward pseudo-rapidity region. The analysis of the simple Monte Carlo-simulated (MC-RAND) events signifies that the observed correlations are not due to mere statistics only; explanation of such correlations can be attributed to the presence of dynamical fluctuations during the production of charged pions. Comparisons of the experimental results with the results obtained from analyzing the UrQMD data sample indicate that the UrQMD model cannot reproduce the experimental findings. The AMPT model also cannot explain the experimental results satisfactorily. Comparisons of our experimental results with the results obtained from the analysis of higher energy emulsion data and with the results of the RHIC data have also been presented.
    Is part of: Journal of Physics G: Nuclear and Particle Physics, 2014, Vol.41(7), p.075106 (14pp)
    Identifier: 0954-3899 (ISSN); 1361-6471 (E-ISSN); 10.1088/0954-3899/41/7/075106 (DOI)

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    Target dependence of clan model parameters at dubna energy-chaotic pion production

    Bhattacharyya, Swarnapratim, Haiduc, Maria, Neagu, Alina Tania, Firu, Elena
    Journal of Physics G: Nuclear and Particle Physics, 2013, Vol.40(2), p.025105 (19pp) [Peer Reviewed Journal]
    IOPscience (IOP Publishing)
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    Title: Target dependence of clan model parameters at dubna energy-chaotic pion production
    Author: Bhattacharyya, Swarnapratim; Haiduc, Maria; Neagu, Alina Tania; Firu, Elena
    Subject: Mathematical Models ; Tables ; Pions ; Intervals ; Saturation ; Chaos Theory ; Approximation ; Projectiles ; Nuclear and High-Energy Physics (General) (So) ; Nuclear and High-Energy Physics (Ah);
    Description: A detailed study of clan model parameters and their target dependence has been carried out in the light of void probability scaling for heavy (AgBr) and light (CNO) groups of targets present in the nuclear emulsion using 22 Ne (at an incident momentum of 4.1 GeV/ c ), 28 Si (at an incident momentum of 4.5 GeV/ c ), 16 O (at an incident momentum of 4.5 GeV/ c ) and 32 S (at an incident momentum of 4.5 GeV/ c ) projectiles. The variation of scaled rap-gap probability with the single moment combination has been studied for all of the interactions. The experimental points are found to lie approximately on the NBD curve for all of the interactions, indicating a scaling behavior. According to the two-source model of particle production, in the case of 32 S–AgBr interactions at 4.5 GeV/c, the pion production mechanism has been found to be almost chaotic. On the contrary, for all of the other interactions at 4.1–4.5 GeV/ c , pion production is predominantly chaotic. Average clan multiplicities ( ) for all of the interactions are found to increase with the increase in the pseudo-rapidity interval Δη. The values of for the AgBr target are larger than those for the CNO target. The average number of particles per clan ( ) increases initially with the increase in pseudo-rapidity interval. An approximate saturation of the values of is observed for 22 Ne and 16 O projectiles around Δη = 6. With the increase in projectile size, the saturation of seems to be wiped out. It can also be observed from the tables that for a particular target the average number of particles per clan ( ) increases with the increase in the size of the projectile nucleus. A comparison with the results of the SPS data has also been presented.
    Is part of: Journal of Physics G: Nuclear and Particle Physics, 2013, Vol.40(2), p.025105 (19pp)
    Identifier: 0954-3899 (ISSN); 1361-6471 (E-ISSN); 10.1088/0954-3899/40/2/025105 (DOI)

    • Several versions

    A Comparative Study of Ratio in Proton-Proton Collisions at Different Energies: Experimental Results versus Model Simulation

    Bhattacharyya, Swarnapratim, Haiduc, Maria, Neagu, Alina Tania, Firu, Elena
    Advances in High Energy Physics, 2018, Vol.2018, 7 pages [Peer Reviewed Journal]

    • Several versions

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

    Bhattacharyya, Swarnapratim, Haiduc, Maria, Neagu, Alina Tania, Firu, Elena
    Advances in High Energy Physics, 2018, Vol.2018, 15 pages [Peer Reviewed Journal]

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    A study of pion fluctuation and correlation in heavy-ion collisions

    Bhattacharyya, Swarnapratim, Haiduc, Maria, Neagu, Alina, Firu, Elena
    The European Physical Journal A, 2016, Vol.52(9), pp.1-13 [Peer Reviewed Journal]
    Springer Science & Business Media B.V.
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    Title: A study of pion fluctuation and correlation in heavy-ion collisions
    Author: Bhattacharyya, Swarnapratim; Haiduc, Maria; Neagu, Alina; Firu, Elena
    Subject: Particle Collisions – Analysis ; Monte Carlo Methods – Analysis ; Bromine Compounds – Analysis;
    Description: A study of pion correlation and fluctuation has been carried out in terms of normalised factorial cumulant moment of second and third order in 16 O-AgBr, 28 Si-AgBr and 32 S-AgBr interactions at 4.5AGeV/ c . Two-particle pion correlations were found to be stronger than the three-particle correlation. Experimental analysis has been compared with the results obtained from the analysis of events simulated by generating random numbers (Monte Carlo Simulation). A comparison of our results with the UrQMD, modified FRITIOF and AMPT models has also been performed. The UrQMD model completely failed to reproduce the experimental results. The modified FRITIOF model also cannot reflect all the features of the experimental outcome. The AMPT model in comparison to the other two models can qualitatively reproduce the experimental results although the strength of the observed correlation in the case of the AMPT model is less than the experimental values.
    Is part of: The European Physical Journal A, 2016, Vol.52(9), pp.1-13
    Identifier: 1434-6001 (ISSN); 1434-601X (E-ISSN); 10.1140/epja/i2016-16301-1 (DOI)

    • Several versions

    Event by Event analysis of Maximum Pseudo-rapidity Gap Fluctuation in High energy Nucleus-nucleus Collisions

    Bhattacharyya, Swarnapratim, Haiduc, Maria, Neagu, Alina, Firu, Elena
    arXiv.org, Sep 3, 2018 [Peer Reviewed Journal]

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    A Comparative Study of kaon to pion ratio in Proton-Proton Collisions at different energies ---Experimental Results vs. Model Simulation

    Bhattacharyya, Swarnapratim, Haiduc, Maria, Neagu, Alina Tania, Firu, Elena
    Cornell University
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    Title: A Comparative Study of kaon to pion ratio in Proton-Proton Collisions at different energies ---Experimental Results vs. Model Simulation
    Author: Bhattacharyya, Swarnapratim; Haiduc, Maria; Neagu, Alina Tania; Firu, Elena
    Subject: Nuclear Experiment
    Description: A detailed study of energy dependence of positive kaon to pion, negative kaon to pion and total kaon to pion multiplicity ratio have been carried out in pp collisions at 6.3, 17.3, 62.4, 200 and 900 GeV and also at root s =2.76 TeV and 7 TeV in the framework of UrQMD and DPMJET III model. Energy dependence of positive kaon to pion and negative kaon to pion show different behavior in case of UrQMD and DPMJET III model. The presence of the horn like structure in the variation of positive kaon to pion and negative kaon to pion ratio with energy for the experimental data is supported by the DPMJET III model. Experimentally it has been observed that as energy increases, the total kaon to pion multiplicity ratio increases systematically for pp collisions at lower energies and becomes independent of energy in LHC energy regime. Our analysis on total kaon to pion multiplicity ratio with UrQMD data is well supported by the experimental results obtained by different collaborations in different times. In case of DPMJET III data, the saturation of kaon to pion ratio at LHC region has not been observed. Comment: three figures. arXiv admin note: text overlap with arXiv:hep-ph/9903244 by other authors
    Identifier: 1707.07330 (ARXIV ID)

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    Projectile Fragmentation of relativistic nuclei in peripheral Collisions

    Bhattacharyya, Swarnapratim, Haiduc, Maria, Neagu, Alina, Firu, Elena
    arXiv.org, Feb 19, 2018
    © ProQuest LLC All rights reserved, Engineering Database, Publicly Available Content Database, ProQuest Engineering Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest One Academic, Engineering Collection (ProQuest)
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    Title: Projectile Fragmentation of relativistic nuclei in peripheral Collisions
    Author: Bhattacharyya, Swarnapratim; Haiduc, Maria; Neagu, Alina; Firu, Elena
    Contributor: Firu, Elena (pacrepositoryorg)
    Subject: Collisions ; Fragments ; Charged Particles ; Fragmentation ; Dependence ; Projectiles ; Emission Analysis
    Description: A study of multiplicity distribution of singly charged, doubly charged, multi charged projectile fragments and shower particles have been carried out for the peripheral collisions in 16O-emulsion,22Ne-emulsion and 28Si-emulsion interactions at an incident momentum of (4.1-4.5) AGeV/c. Events having no target fragments have been designated as peripheral collision events. Percentage of peripheral events has been found to increase with the increase of projectile mass. Dispersion of the multiplicity distribution and its dependence on projectile mass for projectile fragments and shower particles has also been investigated. Dependence of average multiplicity of projectile fragments and shower particles on the mass of the projectile beam has been studied. Study of different fragmentation mode during the emission of multi charged projectile fragments has also been carried out.
    Is part of: arXiv.org, Feb 19, 2018
    Identifier: 2331-8422 (E-ISSN)

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    Multifractal analysis of charged particle multiplicity distribution in the framework of Renyi entropy

    Bhattacharyya, Swarnapratim, Haiduc, Maria, Neagu, Alina, Firu, Elena
    arXiv.org, May 22, 2018
    © ProQuest LLC All rights reserved, Engineering Database, Publicly Available Content Database, ProQuest Engineering Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest One Academic, Engineering Collection (ProQuest)
    Available
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    Title: Multifractal analysis of charged particle multiplicity distribution in the framework of Renyi entropy
    Author: Bhattacharyya, Swarnapratim; Haiduc, Maria; Neagu, Alina; Firu, Elena
    Contributor: Firu, Elena (pacrepositoryorg)
    Subject: Charged Particles ; Entropy (Information Theory) ; Dynamic Tests ; Fractal Analysis ; Molecular Dynamics ; Projectiles ; Computer Simulation ; Specific Heat ; Phase Transitions
    Description: A study of multifractality and multifractal specific heat has been carried out for the produced shower particles in nuclear emulsion detector for 16O-AgBr, 28Si-AgBr and 32S-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 16O-AgBr, 28Si-AgBr and 32S-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.
    Is part of: arXiv.org, May 22, 2018
    Identifier: 2331-8422 (E-ISSN)

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    Projectile Fragmentation of relativistic nuclei in peripheral Collisions

    Bhattacharyya, Swarnapratim, Haiduc, Maria, Neagu, Alina Tania, Firu, Elena
    Cornell University
    Available
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    Title: Projectile Fragmentation of relativistic nuclei in peripheral Collisions
    Author: Bhattacharyya, Swarnapratim; Haiduc, Maria; Neagu, Alina Tania; Firu, Elena
    Subject: Nuclear Experiment
    Description: A study of multiplicity distribution of singly charged, doubly charged, multi charged projectile fragments and shower particles have been carried out for the peripheral collisions in 16O-emulsion,22Ne-emulsion and 28Si-emulsion interactions at an incident momentum of (4.1-4.5) AGeV/c. Events having no target fragments have been designated as peripheral collision events. Percentage of peripheral events has been found to increase with the increase of projectile mass. Dispersion of the multiplicity distribution and its dependence on projectile mass for projectile fragments and shower particles has also been investigated. Dependence of average multiplicity of projectile fragments and shower particles on the mass of the projectile beam has been studied. Study of different fragmentation mode during the emission of multi charged projectile fragments has also been carried out. Comment: arXiv admin note: text overlap with arXiv:nucl-ex/0604007 by other authors
    Identifier: 1709.00882 (ARXIV ID)