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Электронный каталог: Rode, S. P. - Microscopic Study of Baryon Stopping in Low-Energy Heavy-Ion Collisions within the UrQMD Model
Rode, S. P. - Microscopic Study of Baryon Stopping in Low-Energy Heavy-Ion Collisions within the UrQMD Model
Статья
Автор: Rode, S. P.
Physical Review C: Microscopic Study of Baryon Stopping in Low-Energy Heavy-Ion Collisions within the UrQMD Model
б.г.
ISBN отсутствует
Автор: Rode, S. P.
Physical Review C: Microscopic Study of Baryon Stopping in Low-Energy Heavy-Ion Collisions within the UrQMD Model
б.г.
ISBN отсутствует
На полку
Статья
Rode, S.P.
Microscopic Study of Baryon Stopping in Low-Energy Heavy-Ion Collisions within the UrQMD Model / S.P.Rode. – Text : electronic // Physical Review C. – 2026. – Vol. 114, No. 3. – P. 034908. – URL: https://doi.org/10.1103/fp85-w4l2. – Bibliogr.: 48.
In low-energy heavy-ion collisions, baryon stopping is an important process, in which protons from the initial colliding nuclei are stopped at the midrapidity region. Quantifying such stopping can reveal information on the properties of the nuclear medium, such as net-baryon density. Although experimental measurement of net-proton rapidity spectra provides constraints, the microscopic origin of such protons is not fully accessible. Transport model studies can therefore provide deeper insight into the microscopic origin of protons that are transported from initial nuclei, complementing experimental measurements. This article presents an investigation of baryon stopping in minimum-bias Au+Au collisions over a wide range of beam energies, √𝑠&sub(𝑁𝑁)=2.4–17.3 GeV (𝐸&sub(lab)=1.23𝐴–158𝐴 GeV). Final-state protons are classified based on their origin by analyzing their interaction history in the UrQMD model. It is found that a significant fraction of transported protons at midrapidity originates from initial neutrons rather than initial protons, referred to as isospin-converted protons, and their contribution as a function of collision energy and centrality is quantified. Anisotropic flow coefficients of different proton categories are estimated and compared with experimental measurements. Furthermore, a comparison between the 𝜋*−/𝜋*+ ratio and isospin conversion rate is performed. The isospin conversion rate is further compared with the 𝛼 parameters of the Kitazawa-Asakawa formalism, revealing a significant deviation from the chemical equilibrium assumption 𝛼&sub(𝑁)=𝛼&sub(𝜋) below √𝑠&sub(𝑁𝑁)≲10 GeV. Finally, the saturation of the isospin conversion rate is found to coincide with the onset of nuclear transparency, demonstrating that isospin randomization and baryon stopping are coupled phenomena in hadronic transport across the NICA/FAIR energy range.
ОИЯИ = ОИЯИ (JINR)2026
Спец.(статьи,препринты) = С 341 в - Теория ядерной материи
Спец.(статьи,препринты) = С 343 е - Ядерные реакции с тяжелыми ионами$
Спец.(статьи,препринты) = С 343 в - Взаимодействие протонов с ядрами (Z>2). Изобарно- аналоговые состояния
Rode, S.P.
Microscopic Study of Baryon Stopping in Low-Energy Heavy-Ion Collisions within the UrQMD Model / S.P.Rode. – Text : electronic // Physical Review C. – 2026. – Vol. 114, No. 3. – P. 034908. – URL: https://doi.org/10.1103/fp85-w4l2. – Bibliogr.: 48.
In low-energy heavy-ion collisions, baryon stopping is an important process, in which protons from the initial colliding nuclei are stopped at the midrapidity region. Quantifying such stopping can reveal information on the properties of the nuclear medium, such as net-baryon density. Although experimental measurement of net-proton rapidity spectra provides constraints, the microscopic origin of such protons is not fully accessible. Transport model studies can therefore provide deeper insight into the microscopic origin of protons that are transported from initial nuclei, complementing experimental measurements. This article presents an investigation of baryon stopping in minimum-bias Au+Au collisions over a wide range of beam energies, √𝑠&sub(𝑁𝑁)=2.4–17.3 GeV (𝐸&sub(lab)=1.23𝐴–158𝐴 GeV). Final-state protons are classified based on their origin by analyzing their interaction history in the UrQMD model. It is found that a significant fraction of transported protons at midrapidity originates from initial neutrons rather than initial protons, referred to as isospin-converted protons, and their contribution as a function of collision energy and centrality is quantified. Anisotropic flow coefficients of different proton categories are estimated and compared with experimental measurements. Furthermore, a comparison between the 𝜋*−/𝜋*+ ratio and isospin conversion rate is performed. The isospin conversion rate is further compared with the 𝛼 parameters of the Kitazawa-Asakawa formalism, revealing a significant deviation from the chemical equilibrium assumption 𝛼&sub(𝑁)=𝛼&sub(𝜋) below √𝑠&sub(𝑁𝑁)≲10 GeV. Finally, the saturation of the isospin conversion rate is found to coincide with the onset of nuclear transparency, demonstrating that isospin randomization and baryon stopping are coupled phenomena in hadronic transport across the NICA/FAIR energy range.
ОИЯИ = ОИЯИ (JINR)2026
Спец.(статьи,препринты) = С 341 в - Теория ядерной материи
Спец.(статьи,препринты) = С 343 е - Ядерные реакции с тяжелыми ионами$
Спец.(статьи,препринты) = С 343 в - Взаимодействие протонов с ядрами (Z>2). Изобарно- аналоговые состояния
