Kinetic Freeze-Out Temperature and Transverse Flow Velocity in Au-Au Collisions at RHIC-BES Energies

Ajaz, Muhammad; Li, Baochun

doi:10.1155/2020/1787183

Cited by 31 publications

(46 citation statements)

References 62 publications

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“…The central collision corresponds to a very violent collision due to the large number of participant nucleons, which makes the degree of excitation of the system high and results in a high temperature, but as the centrality decreases, the collision become decreasingly violent due to the small number of particles involved in the interaction, which results in the degree of excitation of the system decreasing, and correspondingly the temperature decreases. This result is consistent with [ 5 , 6 , 18 , 27 , 28 , 29 , 60 ], but inconsistent with [ 61 , 62 , 63 , 64 , 65 ]. In addition, the dependence of

is not clear.…”

Section: Resultssupporting

confidence: 63%

“…It is very important to search for the correct trend of

with energy and centrality. Furthermore, there are different kinetic freezeout scenarios found in the literature, which include single, double, triple and multiple kinetic freezeout scenarios [ 5 , 6 , 7 , 8 , 9 , 10 ]. In the single kinetic freezeout scenario, one set of parameters is used for the strange, multi-strange and non-strange particles.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, in the multiple kinetic freezeout scenario, separate sets of parameters are used for each particle. The trend of transverse flow velocity (

) and freezeout volume ( V ) with energy is an increasing trend in most of the literature [ 6 , 11 , 12 , 13 , 14 , 15 , 16 ]. Most of the literature claims to show a decreasing (or invariant) trend of

and V from central to peripheral collisions [ 10 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of Dependence of Kinetic Freezeout Temperature on the Production Cross-Section of Particles in Various Centrality Intervals in Au–Au and Pb–Pb Collisions at High Energies

Ajaz

Peng

2021

Entropy

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Transverse momentum spectra of π+, p, Λ, Ξ or Ξ¯+, Ω or Ω¯+ and deuteron (d) in different centrality intervals in nucleus–nucleus collisions at the center of mass energy are analyzed by the blast wave model with Boltzmann Gibbs statistics. We extracted the kinetic freezeout temperature, transverse flow velocity and kinetic freezeout volume from the transverse momentum spectra of the particles. It is observed that the non-strange and strange (multi-strange) particles freezeout separately due to different reaction cross-sections. While the freezeout volume and transverse flow velocity are mass dependent, they decrease with the resting mass of the particles. The present work reveals the scenario of a double kinetic freezeout in nucleus–nucleus collisions. Furthermore, the kinetic freezeout temperature and freezeout volume are larger in central collisions than peripheral collisions. However, the transverse flow velocity remains almost unchanged from central to peripheral collisions.

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is not clear.…”

Section: Resultssupporting

confidence: 63%

“…It is very important to search for the correct trend of

Section: Introductionmentioning

confidence: 99%

“…In contrast, in the multiple kinetic freezeout scenario, separate sets of parameters are used for each particle. The trend of transverse flow velocity (

and V from central to peripheral collisions [ 10 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of Dependence of Kinetic Freezeout Temperature on the Production Cross-Section of Particles in Various Centrality Intervals in Au–Au and Pb–Pb Collisions at High Energies

Ajaz

Peng

2021

Entropy

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“…The correlation between p 0 ðTÞ and n 0 ðnÞ is similar to that between kinetic freeze-out temperature and transverse flow velocity [60,61] which also show positive correlation at different energies and negative correlation in a given spectrum. If p 0 ðTÞ is similar to kinetic freeze-out temperature, n 0 ðnÞ should be similar to transverse flow velocity.…”

Section: Appendixsupporting

confidence: 58%

Excitation Function of Initial Temperature of Heavy Flavor Quarkonium Emission Source in High Energy Collisions

Wang

Liu

2020

Advances in High Energy Physics

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The transverse momentum spectra of J/ψ, ψ2S, and YnS,n=1,2,3 produced in proton-proton p+p, proton-antiproton p+p¯, proton-lead p+Pb, gold-gold Au+Au, and lead-lead (Pb+Pb) collisions over a wide energy range are analyzed by the (two-component) Erlang distribution, the Hagedorn function (the inverse power-law), and the Tsallis-Levy function. The initial temperature is obtained from the color string percolation model from the fit by the (two-component) Erlang distribution in the framework of a multisource thermal model. The excitation functions of several parameters such as the mean transverse momentum and initial temperature increase from 39 GeV to 13 TeV, which is considered in this work. The mean transverse momentum and initial temperature decrease (increase slightly or do not change significantly) with the increase of rapidity (centrality). Meanwhile, the mean transverse momentum of YnS,n=1,2,3 is larger than that of J/ψ and ψ2S, and the initial temperature for YnS,n=1,2,3 emission is higher than that for J/ψ and ψ2S emission, which shows a mass-dependent behavior.

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“…Different freezeout scenarios are discussed in literature at different stages of the freezeout, but we will focus on kinetic freezeout scenarios in the present work. There are several kinetic freezeout scenarios in literature [15,16,[21][22][23][24] which include single, double, triple and multiple freezeout scenario. In the study of production of light nuclei, it is expected that the freezeout of the particles may also be dependent on the nucleon coalescence and isospin symmetry at higher energies.…”

Section: Introductionmentioning

confidence: 99%

Effects of Coalescence and Isospin Symmetry on the Freezeout of Light Nuclei and Their Anti-particles

Waqas

Peng

Liu

et al. 2021

Preprint

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The transverse momentum spectra of light nuclei (deuteron, triton and helion) produced in various centrality intervals in Gold-Gold (Au-Au), Lead-Lead (Pb-Pb) and proton-Lead (p-Pb) collisions, as well as in inelastic (INEL) proton-proton (pp) collisions are analyzed by the blast wave model with Boltzmann Gibbs statistics. The model results are nearly in agreement with the experimental data measured by STAR and ALICE Collaborations in special transverse momentum ranges. We extracted the bulk properties in terms of kinetic freeze-out temperature, transverse flow velocity and freezeout volume. It is observed that deuteron and anti-deuteron freezeout later than triton and helion as well as their anti-particles due to its smaller mass, while helion and tri-ton, and anti-helion and anti-triton freezeout at the same time due to isospin symmetry at higher energies. It is also observed that light nuclei freezeout earlier than their anti-nuclei due to the large coalescence of nucleons for light nuclei compared to their anti-nuclei. The kinetic freezeout temperature, transverse flow velocity and kinetic freezeout volume decrease from central to peripheral collisions. Furthermore, the transverse flow velocity depends on mass of the particle which decreases with increasing the mass of the particle.PACS: 12.40.Ee, 13.85.Hd, 25.75.Ag, 25.75.Dw, 24.10.Pa

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Kinetic Freeze-Out Temperature and Transverse Flow Velocity in Au-Au Collisions at RHIC-BES Energies

Cited by 31 publications

References 62 publications

Study of Dependence of Kinetic Freezeout Temperature on the Production Cross-Section of Particles in Various Centrality Intervals in Au–Au and Pb–Pb Collisions at High Energies

Study of Dependence of Kinetic Freezeout Temperature on the Production Cross-Section of Particles in Various Centrality Intervals in Au–Au and Pb–Pb Collisions at High Energies

Excitation Function of Initial Temperature of Heavy Flavor Quarkonium Emission Source in High Energy Collisions

Effects of Coalescence and Isospin Symmetry on the Freezeout of Light Nuclei and Their Anti-particles

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