Effects of coalescence and isospin symmetry on the freezeout of light nuclei and their anti-particles

Waqas, M.; Peng, Guang; Liu, Fu‐Hu; Wazir, Z.

doi:10.1038/s41598-021-99455-x

Cited by 24 publications

(15 citation statements)

References 56 publications

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“…2 it is possible to appreciate that the evolution of fluids consisting of heavier particles leads to lower temperature values and therefore to a quicker cooling of the QGP. This suggests that such cases would lead to phase transitions at an earlier time, in complete consistence with theoretical calculations and experimental observations [40] and providing a basis for more complex coalescence models [41].…”

Section: Simulation Details and Resultssupporting

confidence: 66%

Bjorken flow revisited: analytic and numerical solutions in flat space-time coordinates

Simeoni¹,

Gabbana²,

Succi³

2022

Preprint

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In this work we provide analytic and numerical solutions for the Bjorken flow, a standard benchmark in relativistic hydrodynamics providing a simple model for the bulk evolution of matter created in collisions between heavy nuclei. We consider relativistic gases of both massive and massless particles, working in a (2+1) and (3+1) Minkowski space-time coordinate system. The numerical results from a recently developed lattice kinetic scheme show excellent agreement with the analytic solutions.

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Section: Simulation Details and Resultssupporting

confidence: 66%

Bjorken flow revisited: analytic and numerical solutions in flat space-time coordinates

Simeoni¹,

Gabbana²,

Succi³

2022

Preprint

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“…Different literature presented different kinetic freeze-out scenarios such as the single [4], double [5,6], triple [7], and multiple kinetic freezeout scenarios [8][9][10]. In addition, the behavior of T 0 with increasing the centrality and collision energy is also very complex [11][12][13][14]. To our knowledge, the behavior of T 0 with the collision energy is known to increase from a few GeV to 7 or 10 GeV, after which the trend becomes indefinitely saturated, increscent, or decrescent.…”

Section: Introductionmentioning

confidence: 99%

Analyzing Transverse Momentum Spectra by a New Method in High-Energy Collisions

Liu

Ajaz

et al. 2022

Universe

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We analyzed the transverse momentum spectra of positively and negatively charged pions (π+ and π−), positively and negatively charged kaons (K+ and K−), protons and antiprotons (p and p¯), as well as ϕ produced in mid-(pseudo)rapidity region in central nucleus–nucleus (AA) collisions over a center-of-mass energy range from 2.16 to 2760 GeV per nucleon pair. The transverse momentum of the considered particle is regarded as the joint contribution of two participant partons which obey the modified Tsallis-like transverse momentum distribution and have random azimuths in superposition. The calculation of transverse momentum distribution of particles is performed by the Monte Carlo method and compared with the experimental data measured by international collaborations. The excitation functions of effective temperature and other parameters are obtained in the considered energy range. With the increase of collision energy, the effective temperature parameter increases quickly and then slowly. The boundary appears at around 5 GeV, which means the change of reaction mechanism and/or generated matter.

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“…In the present article, we will analyze the bulk properties in terms of kinetic freeze-out temperature (T 0 ), transverse flow velocity (β T ) and kinetic freeze-out volume (V ). All these mentioned parameters are discussed in detail in various literatures [11][12][13][14]. In the present work, we choose different collision systems such as small and large systems in order to check the dependence of the above parameters on the size of interacting system and different particles are chosen in order to check the differences in different particle emissions.…”

Section: Introductionmentioning

confidence: 99%

Observation of different scenarios in different temperatures in small and large collision systems

Waqas¹,

Liu²,

Peng³

et al. 2021

Preprint

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We used the modified Hagedron function and analyzed the experimental data measured by the BRAHMS, STAR, PHENIX and ALICE Collaborations in Copper-Copper, Gold-Gold, deuteron-Gold, Lead-Lead, proton-Lead and proton-proton collisions, and extracted the related parameters (kinetic freeze-out temperature, transverse flow velocity, kinetic freeze-out volume, mean transverse momentum and initial temperature) from the transverse momentum spectra of the particles (non-strange and strange particles). We observed that all the above parameters decrease from central to peripheral collisions, except transverse flow velocity which remains unchanged from central to peripheral collisions. The kinetic freeze-out temperature depends on the cross-section interaction of the particle such that larger cross-section of the particle corresponds to smaller T0, and reveals the two kinetic freeze-out scenario, while the initial temperature depends on the mass of the particle and it increase with the particle mass. The transverse flow velocity and mean transverse momentum depends on the mass of the particle and the former decrease while the later increase with the particle mass. In addition, the kinetic kinetic freeze-out volume also decrease with particle mass which reveals the volume differential freeze-out scenario and indicates different freeze-out surfaces for different particles. We also extracted the entropy index-parameter n and the parameter N0, and the former remains almost unchanged while the later decrease from central to peripheral collisions. Furthermore, the kinetic freeze-out temperature, transverse flow velocity, kinetic freeze-out volume, initial temperature, mean transverse momentum and the parameter N0 at LHC are larger than that of RHIC, and they show their dependence on the collision cross-section as well as on collision energy at RHIC and LHC.

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Effects of coalescence and isospin symmetry on the freezeout of light nuclei and their anti-particles

Cited by 24 publications

References 56 publications

Bjorken flow revisited: analytic and numerical solutions in flat space-time coordinates

Bjorken flow revisited: analytic and numerical solutions in flat space-time coordinates

Analyzing Transverse Momentum Spectra by a New Method in High-Energy Collisions

Observation of different scenarios in different temperatures in small and large collision systems

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