{"title":"通过镜像核的电荷半径估算核对称性能量的斜率","authors":"Sakshi Gautam , Anagh Venneti , Sarmistha Banik , B.K. Agrawal","doi":"10.1016/j.nuclphysa.2024.122832","DOIUrl":null,"url":null,"abstract":"<div><p>Charge radii of mirror nuclei are calculated by implementing pairing effects with the Hartree-Fock Bogoliubov approximation. Correlations between the difference of charge radii (<span><math><mi>Δ</mi><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub></math></span><span>) and slope of nuclear symmetry energy (L) are examined for different mirror nuclei pairs of varying masses using 40 different Skyrme energy density functionals. </span><span><math><mi>Δ</mi><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub><mo>−</mo><mi>L</mi></math></span> correlations are found to be robust for the binding constraints imposed on density functionals. We observe that <span><math><mi>Δ</mi><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub></math></span> and <em>L</em> show relatively better correlations in relatively heavier pairs than those obtained in the lighter pairs. Our calculations impose a constraint on the slope of nuclear symmetry energy as -20 MeV ≤<em>L</em>≤ 55 MeV with 68% confidence band using available measurements on charge radii. This is a moderately soft symmetry energy, in contrast to stiff and soft symmetry energy indicated by PREX-II and CREX measurements of neutron skin thickness in <span><math><mmultiscripts><mrow><mi>P</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>208</mn></mrow></mmultiscripts><mi>b</mi></math></span> and <span><math><mmultiscripts><mrow><mi>C</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>48</mn></mrow></mmultiscripts><mi>a</mi></math></span><span>, respectively. Our result is also in agreement with celestial constraints obtained from observational data for neutron stars.</span></p></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Estimation of the slope of nuclear symmetry energy via charge radii of mirror nuclei\",\"authors\":\"Sakshi Gautam , Anagh Venneti , Sarmistha Banik , B.K. Agrawal\",\"doi\":\"10.1016/j.nuclphysa.2024.122832\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Charge radii of mirror nuclei are calculated by implementing pairing effects with the Hartree-Fock Bogoliubov approximation. Correlations between the difference of charge radii (<span><math><mi>Δ</mi><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub></math></span><span>) and slope of nuclear symmetry energy (L) are examined for different mirror nuclei pairs of varying masses using 40 different Skyrme energy density functionals. </span><span><math><mi>Δ</mi><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub><mo>−</mo><mi>L</mi></math></span> correlations are found to be robust for the binding constraints imposed on density functionals. We observe that <span><math><mi>Δ</mi><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub></math></span> and <em>L</em> show relatively better correlations in relatively heavier pairs than those obtained in the lighter pairs. Our calculations impose a constraint on the slope of nuclear symmetry energy as -20 MeV ≤<em>L</em>≤ 55 MeV with 68% confidence band using available measurements on charge radii. This is a moderately soft symmetry energy, in contrast to stiff and soft symmetry energy indicated by PREX-II and CREX measurements of neutron skin thickness in <span><math><mmultiscripts><mrow><mi>P</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>208</mn></mrow></mmultiscripts><mi>b</mi></math></span> and <span><math><mmultiscripts><mrow><mi>C</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>48</mn></mrow></mmultiscripts><mi>a</mi></math></span><span>, respectively. Our result is also in agreement with celestial constraints obtained from observational data for neutron stars.</span></p></div>\",\"PeriodicalId\":19246,\"journal\":{\"name\":\"Nuclear Physics A\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2024-01-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nuclear Physics A\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0375947424000149\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Physics A","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0375947424000149","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, NUCLEAR","Score":null,"Total":0}
Estimation of the slope of nuclear symmetry energy via charge radii of mirror nuclei
Charge radii of mirror nuclei are calculated by implementing pairing effects with the Hartree-Fock Bogoliubov approximation. Correlations between the difference of charge radii () and slope of nuclear symmetry energy (L) are examined for different mirror nuclei pairs of varying masses using 40 different Skyrme energy density functionals. correlations are found to be robust for the binding constraints imposed on density functionals. We observe that and L show relatively better correlations in relatively heavier pairs than those obtained in the lighter pairs. Our calculations impose a constraint on the slope of nuclear symmetry energy as -20 MeV ≤L≤ 55 MeV with 68% confidence band using available measurements on charge radii. This is a moderately soft symmetry energy, in contrast to stiff and soft symmetry energy indicated by PREX-II and CREX measurements of neutron skin thickness in and , respectively. Our result is also in agreement with celestial constraints obtained from observational data for neutron stars.
期刊介绍:
Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.