Relativistic Effects in Transverse Flow in the Molecular Dynamics Framework

Maruyama, Tomoyuki; Niita, Koji; Maruyama, Toshiki; Chiba, Satoshi; Nakahara, Y.; Iwamoto, Akira

doi:10.1143/ptp.96.263

Cited by 29 publications

(22 citation statements)

References 9 publications

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“…Additionally, m j /E j , a covariance-related reduction factor for potentials in the Hamiltonian used as in the simplified version of the relativistic quantum molecular dynamics (RQMD/S) model [24,[49][50][51][52]. The squares and circles represent the F2(M ) of the real and mixed events, respectively.…”

Section: Methodsmentioning

confidence: 99%

Proton correlations and apparent intermittency in the UrQMD model with hadronic potentials

Li,

Wang,

Steinheimer

et al. 2021

Preprint

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It is shown that the inclusion of hadronic interactions, and in particular nuclear potentials, in simulations of heavy ion collisions at the SPS energy range can lead to obvious correlations of protons. These correlations contribute significantly to an intermittency analysis as performed at the NA61 experiment. The beam energy and system size dependence is studied by comparing the resulting intermittency index for heavy ion collisions of different nuclei at beam energies of 40A, 80A and 150A GeV. The resulting intermittency index from our simulations is similar to the reported values of the NA61 collaboration, if nuclear interactions are included. The observed apparent intermittency signal is the result of the correlated proton pairs with small relative transverse momentum ∆pt, which would be enhanced by hadronic potentials, and this correlation between the protons is slightly influenced by the coalescence parameters and the relative invariant four-momentum qinv cut.

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Section: Methodsmentioning

confidence: 99%

Proton correlations and apparent intermittency in the UrQMD model with hadronic potentials

Li,

Wang,

Steinheimer

et al. 2021

Preprint

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show abstract

“…In JAM, the nuclear mean-field is implemented based on the RQMD/S [8,10] model. In this approach, the Hamiltonian is given by the sum of the single particle energy: (1) and the equations of motion…”

Section: Modelmentioning

confidence: 99%

“…Many body effects (multiparticle interactions), are implemented in the Boltzmann-Uehling-Uhlenbeck (BUU) [6] and the quantum molecular dynamics (QMD) models [7] in which nuclear meanfield potentials are introduced in the cascade model. In JAM, a nuclear mean-field is implemented [8,9] based on the simplified version of the relativistic quantum molecular dynamics (RQMD/S) approach [10].…”

Section: Introductionmentioning

confidence: 99%

JAM: an event generator for high energy nuclear collisions

Nara

2019

EPJ Web Conf.

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We review recent developments of an event generator JAM microscopic transport model to simulate high energy nuclear collisions, especially at high baryon density regions. Recent developments focus on the collective effects: implementation of nuclear potentials, equation of state (EoS) modified collision term, and dynamical integration of fluid dynamics. With these extensions, we can discuss the EoS dependence of the transverse collective flows.

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“…For example, in Ref. [34], with the help of a mean field from RQMD/S [35] and a Jet AA Microscopic Transportation Model (JAM) it has been found that the momentum dependence in the nuclear mean field is important for the understanding of the proton collective flows at AGS and SPS energies.…”

Section: Urqmd Transport Modelmentioning

confidence: 99%

Pion freeze-out as seen through HBT correlations in HICs from FAIR/AGS to RHIC energies

Li¹

2008

Proceedings of Critical Point and Onset of Deconfinement - 4th International Workshop — PoS(CPOD07)

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In this talk we present the results of two-pion HBT correlation at freeze-out in heavy ion collisions (HICs) from AGS to RHIC energies. The UrQMD hadron-string transport model as well as the CRAB analyzing program are adopted. Based on the cascade mode, in general, the calculations are satisfying and well in line with the experimental data although discrepancies are not negligible. Such as: I), the HBT time-related puzzle exists at all energies. II), at low AGS energies, the calculated volume as well as the mean free path of pion source at freeze-out are lower than data. It implies that a better description of interactions of particles at early stage of HICs is required.

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Relativistic Effects in Transverse Flow in the Molecular Dynamics Framework

Cited by 29 publications

References 9 publications

Proton correlations and apparent intermittency in the UrQMD model with hadronic potentials

Proton correlations and apparent intermittency in the UrQMD model with hadronic potentials

JAM: an event generator for high energy nuclear collisions

Pion freeze-out as seen through HBT correlations in HICs from FAIR/AGS to RHIC energies

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