This query concerns only resources held in libraries.
12 results
Sort by:
Add to the list:
    • Article
    Select
    More…
    Title: A Monte Carlo Study of Multiplicity Fluctuations in Pb-Pb Collisions at LHC Energies
    Author: Gupta, Ramni
    Subject: Nuclear Experiment
    Description: With large volumes of data available from LHC, it has become possible to study the multiplicity distributions for the various possible behaviours of the multiparticle production in collisions of relativistic heavy ion collisions, where a system of dense and hot partons has been created. In this context it is important and interesting as well to check how well the Monte Carlo generators can describe the properties or the behaviour of multiparticle production processes. One such possible behaviour is the self-similarity in the particle production, which can be studied with the intermittency studies and further with chaoticity/erraticity, in the heavy ion collisions. We analyse the behaviour of erraticity index in central Pb-Pb collisions at centre of mass energy of 2.76 TeV per nucleon using the AMPT monte carlo event generator, following the recent proposal by R.C. Hwa and C.B. Yang, concerning the local multiplicity fluctuation study as a signature of critical hadronization in heavy-ion collisions. We report the values of erraticity index for the two versions of the model with default settings and their dependence on the size of the phase space region. Results presented here may serve as a reference sample for the experimental data from heavy ion collisions at these energies. Comment: 12 pages, 10 Figures, WPCF-2014. arXiv admin note: substantial text overlap with arXiv:1411.0280
    Identifier: 1501.03773 (ARXIV ID)

    • Several versions

    Scaling Properties of Multiplicity Fluctuations in the AMPT Model

    Sharma, Rohni, Gupta, Ramni
    Advances in High Energy Physics, 2018, Vol.2018 [Peer Reviewed Journal]

    • Article
    Select

    A Monte Carlo Study of Multiplicity Fluctuations in Pb-Pb Collisions at LHC Energies

    Gupta, Ramni
    arXiv.org, Jan 15, 2015
    © 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
    More…
    Title: A Monte Carlo Study of Multiplicity Fluctuations in Pb-Pb Collisions at LHC Energies
    Author: Gupta, Ramni
    Contributor: Gupta, Ramni (pacrepositoryorg)
    Subject: Monte Carlo Simulation ; Partons ; Heavy Ions ; Particle Production ; Dependence ; Self-Similarity ; Computer Simulation ; Variation ; Ionic Collisions
    Description: With large volumes of data available from LHC, it has become possible to study the multiplicity distributions for the various possible behaviours of the multiparticle production in collisions of relativistic heavy ion collisions, where a system of dense and hot partons has been created. In this context it is important and interesting as well to check how well the Monte Carlo generators can describe the properties or the behaviour of multiparticle production processes. One such possible behaviour is the self-similarity in the particle production, which can be studied with the intermittency studies and further with chaoticity/erraticity, in the heavy ion collisions. We analyse the behaviour of erraticity index in central Pb-Pb collisions at centre of mass energy of 2.76 TeV per nucleon using the AMPT monte carlo event generator, following the recent proposal by R.C. Hwa and C.B. Yang, concerning the local multiplicity fluctuation study as a signature of critical hadronization in heavy-ion...
    Is part of: arXiv.org, Jan 15, 2015
    Identifier: 2331-8422 (E-ISSN)

    • Article
    Select

    A Monte Carlo Study of Multiplicity Fluctuations in Pb-Pb Collisions at LHC Energies

    Gupta, Ramni
    AgEcon Search: Research in Agricultural and Applied Economics
    Available
    More…
    Title: A Monte Carlo Study of Multiplicity Fluctuations in Pb-Pb Collisions at LHC Energies
    Author: Gupta, Ramni
    Subject: Research and Development/Tech Change/Emerging Technologies
    Description: With large volumes of data available from LHC, it has become possible to study the multiplicity distributions for the various possible behaviours of the multiparticle production in collisions of relativistic heavy ion collisions, where a system of dense and hot partons has been created. In this context it is important and interesting as well to check how well the Monte Carlo generators can describe the properties or the behaviour of multiparticle production processes. One such possible behaviour is the self-similarity in the particle production, which can be studied with the intermittency studies and further with chaoticity/erraticity, in the heavy ion collisions. We analyse the behaviour of erraticity index in central Pb-Pb collisions at centre of mass energy of 2.76 TeV per nucleon using the AMPT monte carlo event generator, following the recent proposal by R.C. Hwa and C.B. Yang, concerning the local multiplicity fluctuation study as a signature of critical hadronization in...

    • Article
    Select

    Evidence on the absence of critical transition in AMPT for Pb-Pb collisions at \(sqrt{s_{\rm{NN}}}\) = 2.76 TeV

    Gupta, Ramni, Sharma, Rohni
    arXiv.org, Jan 28, 2015
    © 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
    More…
    Title: Evidence on the absence of critical transition in AMPT for Pb-Pb collisions at \(sqrt{s_{\rm{NN}}}\) = 2.76 TeV
    Author: Gupta, Ramni; Sharma, Rohni
    Contributor: Sharma, Rohni (pacrepositoryorg)
    Subject: Charged Particles ; Scaling ; Collisions ; Intermittency ; Quark-Gluon Plasma ; Particle Production ; Variations ; Phase Transitions
    Description: Event-by-event fluctuations in the spatial patterns in charged particles generated in Pb--Pb collisions at the center-of-mass energy \(\sqrt{S_{\rm{NN}}}\) = 2.76 TeV are studied within A MultiPhase Transport (AMPT) model. The spatial patterns of the particles generated in the (\(\eta, \phi\)) space for \(|\eta| \le 0.8\) are studied using the methodology of intermittency and erraticity analysis. We find negative intermittency for charged particles generated in a range of \(p_{\rm{T}}\) windows. This result contrasts sharply from what is expected for a quark-gluon plasma undergoing hadronization by a second-order phase transition. Appropriate scaling behavior is examined, resulting in definitive scaling exponent \(\nu_{-}\). Event-by-event fluctuations in the spatial patterns quantified by an index, named erraticity index are determined for different \(p_{\rm{T}}\) bins \(\leq 1\) GeV/c, for AMPT model. This is the first time that the intermittency and erraticity indices are determined...
    Is part of: arXiv.org, Jan 28, 2015
    Identifier: 2331-8422 (E-ISSN)

    • Article
    Select

    Scaling Properties of Multiplicity Fluctuations in the AMPT Model

    Sharma, Rohni, Gupta, Ramni
    arXiv.org, Oct 29, 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
    More…
    Title: Scaling Properties of Multiplicity Fluctuations in the AMPT Model
    Author: Sharma, Rohni; Gupta, Ramni
    Contributor: Gupta, Ramni (pacrepositoryorg)
    Subject: Phase Transitions ; Feature Extraction ; Scaling ; Transverse Momentum ; Charged Particles ; Phase Transitions ; Variation
    Description: From the events generated from the MC code of a multi-phase transport (AMPT) model with string melting, the properties of multiplicity fluctuations of charged particles in Pb-Pb collisions at \(\sqrt{s_{\mathrm{NN}}}=\rm{~2.76 \,TeV}\) are studied. Normalized factorial moments, \(F_{q}\), of spatial distributions of the particles have been determined in the framework of intermittency. Those moments are found in some kinematic regions to exhibit scaling behavior at small bin sizes, but not in most regions. However, in relating \(F_{q}\) to \(F_{2}\) scaling behavior is found in nearly all regions. The corresponding scaling exponents, \(\nu\), determined in the low transverse momentum (\(p_{\rm{T}}\)) region \(\le\) 1.0 GeV/c are observed to be independent of the \(p_{\rm{T}}\) bin position and width. The value of \(\nu\) is found to be larger than 1.304, which is the value that characterizes the Ginzburg-Landau type second order phase transition. Thus there is no known signature for phase...
    Is part of: arXiv.org, Oct 29, 2018
    Identifier: 2331-8422 (E-ISSN)

    • Article
    Select
    More…
    Title: Evidence on the absence of critical transition in AMPT for Pb-Pb collisions at $sqrt{s_{\rm{NN}}}$ = 2.76 TeV
    Author: Gupta, Ramni; Sharma, Rohni
    Subject: Nuclear Experiment ; High Energy Physics - Phenomenology ; Nuclear Theory
    Description: Event-by-event fluctuations in the spatial patterns in charged particles generated in Pb--Pb collisions at the center-of-mass energy $\sqrt{S_{\rm{NN}}}$ = 2.76 TeV are studied within A MultiPhase Transport (AMPT) model. The spatial patterns of the particles generated in the ($\eta, \phi$) space for $|\eta| \le 0.8$ are studied using the methodology of intermittency and erraticity analysis. We find negative intermittency for charged particles generated in a range of $p_{\rm{T}}$ windows. This result contrasts sharply from what is expected for a quark-gluon plasma undergoing hadronization by a second-order phase transition. Appropriate scaling behavior is examined, resulting in definitive scaling exponent $\nu_{-}$. Event-by-event fluctuations in the spatial patterns quantified by an index, named erraticity index are determined for different $p_{\rm{T}}$ bins $\leq 1$ GeV/c, for AMPT model. This is the first time that the intermittency and erraticity indices are determined for any model at such high energies. The results presented here can be used for comparison with the fluctuation properties of the experimental data and hence can help the development of a wider scope of understanding of validity of the particle production process by AMPT at these energies on the one hand, and of the true nature of the real data on the other. Comment: 15 pages, 11 Figuers
    Identifier: 1411.0280 (ARXIV ID)

    • Article
    Select

    Scaling Properties of Multiplicity Fluctuations in the AMPT Model

    Sharma, Rohni, Gupta, Ramni
    Cornell University
    Available
    More…
    Title: Scaling Properties of Multiplicity Fluctuations in the AMPT Model
    Author: Sharma, Rohni; Gupta, Ramni
    Subject: High Energy Physics - Phenomenology
    Description: From the events generated from the MC code of a multi-phase transport (AMPT) model with string melting, the properties of multiplicity fluctuations of charged particles in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=\rm{~2.76 \,TeV}$ are studied. Normalized factorial moments, $F_{q}$, of spatial distributions of the particles have been determined in the framework of intermittency. Those moments are found in some kinematic regions to exhibit scaling behavior at small bin sizes, but not in most regions. However, in relating $F_{q}$ to $F_{2}$ scaling behavior is found in nearly all regions. The corresponding scaling exponents, $\nu$, determined in the low transverse momentum ($p_{\rm{T}}$) region $\le$ 1.0 GeV/c are observed to be independent of the $p_{\rm{T}}$ bin position and width. The value of $\nu$ is found to be larger than 1.304, which is the value that characterizes the Ginzburg-Landau type second order phase transition. Thus there is no known signature for phase transition in the AMPT model. This study demonstrates that, for the system under investigation, the method of analysis is effective in extracting features that are relevant to the question of whether the dynamical processes leading phase transition are there or not. Comment: 6 pages, 5 figures
    Identifier: 1806.10854 (ARXIV ID)

    • Several versions

    Intermittency Study of Charged Particles Generated in Pb-Pb Collisions at sNN=2.76 TeV Using EPOS3

    Gupta, Ramni, Sarkisyan-Grinbaum, Edward
    Advances in High Energy Physics, 2020, Vol.2020 [Peer Reviewed Journal]

    • Several versions

    Corrigendum to “Intermittency Study of Charged Particles Generated in Pb-Pb Collisions at sNN=2.76 TeV Using EPOS3”

    Gupta, Ramni
    Advances in High Energy Physics, 2020, Vol.2020 [Peer Reviewed Journal]