Probing neutron-proton dynamics by pions
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- 大西, 明
- Department of Regional Environment, Tottori University
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- Ono, Akira
- Department of Physics, Tohoku University
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- Nara, Yasushi
- Akita International University
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- Ohnishi, Akira
- Yukawa Institute for Theoretical Physics, Kyoto University
抄録
In order to investigate the nuclear symmetry energy at high density, we study the pion production in central collisions of neutron-rich nuclei ¹³²Sn+¹²⁴Sn at 300 MeV/nucleon using a new approach that combines antisymmetrized molecular dynamics (AMD) and a hadronic cascade model (JAM). The dynamics of neutrons and protons is solved by AMD, and then pions and Δ resonances in the reaction process are handled by JAM. We see the mechanism by which the Δ resonance and pions are produced, reflecting the dynamics of neutrons and protons. We also investigate the impacts of cluster correlations as well as of the high-density symmetry energy on the nucleon dynamics and consequently on the pion ratio. We find that the Δ-/Δ++ production ratio agrees very well with the neutron-proton squared ratio (N/Z)² in the high-density and high-momentum region. We show quantitatively that the Δ production ratio, and therefore (N/Z)², are directly reflected in the π-/π+ ratio, with modification in the final stage of the reaction.
Erratum: Probing neutron-proton dynamics by pions [Phys. Rev. C 93, 044612 (2016)]. Natsumi Ikeno, Akira Ono, Yasushi Nara, and Akira Ohnishi. Phys. Rev. C 97, 069902 (2018)
収録刊行物
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- Physical Review C
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Physical Review C 93 (4), 1-13, 2016-04
American Physical Society
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詳細情報 詳細情報について
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- CRID
- 1050282810837087488
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- NII論文ID
- 120006496958
- 120006779994
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- ISSN
- 1089490X
- 05562813
- 24699993
- 24699985
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- HANDLE
- 2433/233196
- 10097/00126902
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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