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Электронный каталог: Kireyeu, V. - Systematic Study of Flow of Protons and Light Clusters in Intermediate-Energy Heavy-Ion Collision...
Kireyeu, V. - Systematic Study of Flow of Protons and Light Clusters in Intermediate-Energy Heavy-Ion Collision...
Статья
Автор: Kireyeu, V.
Physical Review C: Systematic Study of Flow of Protons and Light Clusters in Intermediate-Energy Heavy-Ion Collision...
б.г.
ISBN отсутствует
Автор: Kireyeu, V.
Physical Review C: Systematic Study of Flow of Protons and Light Clusters in Intermediate-Energy Heavy-Ion Collision...
б.г.
ISBN отсутствует
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Статья
Kireyeu, V.
Systematic Study of Flow of Protons and Light Clusters in Intermediate-Energy Heavy-Ion Collisions with Momentum-Dependent Potentials / V.Kireyeu, V.Voronyuk, [a.o.]. – Text : electronic // Physical Review C. – 2026. – Vol. 113, No. 6. – P. 064909. – URL: https://doi.org/10.1103/3k9g-883k.
We study the influence of the nuclear equation of state (EOS) on collective observables—the directed (𝑣&sub(1)) and elliptic flow (*n&sub(2)) of nucleons and light clusters—in heavy-ion collisions at gigaelectronvolt energies energies using the parton-hadron-quantum-molecular dynamics (PHQMD) approach. A novel development in this work is the inclusion of a momentum-dependent nucleon potential in the PHQMD in addition to the static, density-dependent Skyrme interaction. This enables three distinct EOS scenarios: two static (“soft” and “hard,” differing in compressibility) and a soft, momentum-dependent EOS calibrated to 𝑝𝐴 elastic scattering data. In PHQMD, clusters form during the entire heavy-ion collision via nucleon interactions and are identified using the minimum spanning tree (MST) algorithm, including additional deuteron production from hadronic kinetic reactions. We find a strong EOS sensitivity in proton and cluster rapidity and 𝑝&sub(𝑇) distributions: soft and soft momentum-dependent EOS yield similar results, markedly different from the hard EOS. Softening the EOS reduces proton yields at midrapidity while enhancing light-cluster production. The EOS also affects flow observables differently for nucleons and clusters. For protons, a soft momentum-dependent potential increases slightly the magnitude of 𝑣&sub(1) and 𝑣&sub(2) relative to the hard EOS, whereas cluster flows are nearly similar. The soft momentum-dependent EOS provides an overall good agreement with experimental data from HADES and FOPI Collaborations while the soft EOS is not in line with the data. A scaling of 𝑣&sub(2) with cluster mass number 𝐴 is observed at midrapidity for low 𝑝&sub(𝑇), which breaks at higher 𝑝&sub(𝑇). Finally, we examine the sensitivity of flow observables to deuteron production mechanisms. Deuterons formed via MST clustering exhibit different flow patterns from those produced by coalescence at freeze-out, indicating that flow harmonics may help discriminate between cluster formation scenarios.
ОИЯИ = ОИЯИ (JINR)2026
Спец.(статьи,препринты) = С 343 е1 - Взаимодействие тяжелых ионов с ядрами
Kireyeu, V.
Systematic Study of Flow of Protons and Light Clusters in Intermediate-Energy Heavy-Ion Collisions with Momentum-Dependent Potentials / V.Kireyeu, V.Voronyuk, [a.o.]. – Text : electronic // Physical Review C. – 2026. – Vol. 113, No. 6. – P. 064909. – URL: https://doi.org/10.1103/3k9g-883k.
We study the influence of the nuclear equation of state (EOS) on collective observables—the directed (𝑣&sub(1)) and elliptic flow (*n&sub(2)) of nucleons and light clusters—in heavy-ion collisions at gigaelectronvolt energies energies using the parton-hadron-quantum-molecular dynamics (PHQMD) approach. A novel development in this work is the inclusion of a momentum-dependent nucleon potential in the PHQMD in addition to the static, density-dependent Skyrme interaction. This enables three distinct EOS scenarios: two static (“soft” and “hard,” differing in compressibility) and a soft, momentum-dependent EOS calibrated to 𝑝𝐴 elastic scattering data. In PHQMD, clusters form during the entire heavy-ion collision via nucleon interactions and are identified using the minimum spanning tree (MST) algorithm, including additional deuteron production from hadronic kinetic reactions. We find a strong EOS sensitivity in proton and cluster rapidity and 𝑝&sub(𝑇) distributions: soft and soft momentum-dependent EOS yield similar results, markedly different from the hard EOS. Softening the EOS reduces proton yields at midrapidity while enhancing light-cluster production. The EOS also affects flow observables differently for nucleons and clusters. For protons, a soft momentum-dependent potential increases slightly the magnitude of 𝑣&sub(1) and 𝑣&sub(2) relative to the hard EOS, whereas cluster flows are nearly similar. The soft momentum-dependent EOS provides an overall good agreement with experimental data from HADES and FOPI Collaborations while the soft EOS is not in line with the data. A scaling of 𝑣&sub(2) with cluster mass number 𝐴 is observed at midrapidity for low 𝑝&sub(𝑇), which breaks at higher 𝑝&sub(𝑇). Finally, we examine the sensitivity of flow observables to deuteron production mechanisms. Deuterons formed via MST clustering exhibit different flow patterns from those produced by coalescence at freeze-out, indicating that flow harmonics may help discriminate between cluster formation scenarios.
ОИЯИ = ОИЯИ (JINR)2026
Спец.(статьи,препринты) = С 343 е1 - Взаимодействие тяжелых ионов с ядрами
