Sunil Kumar, Mukul Kumar, Raj K. Jagota, Shashi K. Dhiman
{"title":"在相对论框架下用等矢量标量δ介子连接中子蒙皮厚度和中子星观测值","authors":"Sunil Kumar, Mukul Kumar, Raj K. Jagota, Shashi K. Dhiman","doi":"10.1016/j.nuclphysa.2025.123238","DOIUrl":null,"url":null,"abstract":"<div><div>Recent developments in the parity-violating electron scattering experiments on <sup>48</sup>Ca (CREX) and for <sup>208</sup>Pb (PREX-II) has provided new insight on the neutron skin thickness. These findings reveal several viewpoints on nuclear matter parameters (NMPs) such as symmetry energy (J) and its linear density dependency (L), which are directly related to the equation of state (EoS) of asymmetric dense matter. While PREX results lead to stiffer L and hence necessitate a stiffer EoS, the CREX experiments favor softer L and hence a softer EoS. Therefore, it is challenging to produce neutron skin of both (<sup>48</sup>Ca and <sup>208</sup>Pb) in relativistic mean field (RMF) models simultaneously. To address this issue, we propose relativistic interactions based on RMF model comprising of self and cross interactions of <em>σ</em>, <em>ω</em>, <em>ρ</em> and <em>δ</em> mesons. These interactions are consistent with the results of both experiments, and they accurately replicate experimental data related to the ground state properties, such as binding energies (BE) and charge radii (<span><math><msub><mrow><mi>r</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub></math></span>), of both closed and open shell nuclei. We also compute the EoSs comprising of npe<em>μ</em> matter under <em>β</em>-equilibrium condition for the proposed interactions and hence calculate neutron star observables.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1064 ","pages":"Article 123238"},"PeriodicalIF":2.5000,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Connecting neutron skin thickness and neutron star observables through isovector scalar delta meson in relativistic framework\",\"authors\":\"Sunil Kumar, Mukul Kumar, Raj K. Jagota, Shashi K. Dhiman\",\"doi\":\"10.1016/j.nuclphysa.2025.123238\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Recent developments in the parity-violating electron scattering experiments on <sup>48</sup>Ca (CREX) and for <sup>208</sup>Pb (PREX-II) has provided new insight on the neutron skin thickness. These findings reveal several viewpoints on nuclear matter parameters (NMPs) such as symmetry energy (J) and its linear density dependency (L), which are directly related to the equation of state (EoS) of asymmetric dense matter. While PREX results lead to stiffer L and hence necessitate a stiffer EoS, the CREX experiments favor softer L and hence a softer EoS. Therefore, it is challenging to produce neutron skin of both (<sup>48</sup>Ca and <sup>208</sup>Pb) in relativistic mean field (RMF) models simultaneously. To address this issue, we propose relativistic interactions based on RMF model comprising of self and cross interactions of <em>σ</em>, <em>ω</em>, <em>ρ</em> and <em>δ</em> mesons. These interactions are consistent with the results of both experiments, and they accurately replicate experimental data related to the ground state properties, such as binding energies (BE) and charge radii (<span><math><msub><mrow><mi>r</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub></math></span>), of both closed and open shell nuclei. We also compute the EoSs comprising of npe<em>μ</em> matter under <em>β</em>-equilibrium condition for the proposed interactions and hence calculate neutron star observables.</div></div>\",\"PeriodicalId\":19246,\"journal\":{\"name\":\"Nuclear Physics A\",\"volume\":\"1064 \",\"pages\":\"Article 123238\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-09-09\",\"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/S0375947425002246\",\"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/S0375947425002246","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}
Connecting neutron skin thickness and neutron star observables through isovector scalar delta meson in relativistic framework
Recent developments in the parity-violating electron scattering experiments on 48Ca (CREX) and for 208Pb (PREX-II) has provided new insight on the neutron skin thickness. These findings reveal several viewpoints on nuclear matter parameters (NMPs) such as symmetry energy (J) and its linear density dependency (L), which are directly related to the equation of state (EoS) of asymmetric dense matter. While PREX results lead to stiffer L and hence necessitate a stiffer EoS, the CREX experiments favor softer L and hence a softer EoS. Therefore, it is challenging to produce neutron skin of both (48Ca and 208Pb) in relativistic mean field (RMF) models simultaneously. To address this issue, we propose relativistic interactions based on RMF model comprising of self and cross interactions of σ, ω, ρ and δ mesons. These interactions are consistent with the results of both experiments, and they accurately replicate experimental data related to the ground state properties, such as binding energies (BE) and charge radii (), of both closed and open shell nuclei. We also compute the EoSs comprising of npeμ matter under β-equilibrium condition for the proposed interactions and hence calculate neutron star observables.
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.