Neutron Decay Anomaly and Its Effects on Neutron Star Properties
We investigate the effects of dark matter (DM) on neutron star (NS) properties using the neutron decay anomaly model within the relativistic mean-field (RMF) framework. Three nucleonic models (HCD0–HCD2) are developed, satisfying astrophysical constraints such as the maximum NS mass (≥<inline-for...
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2025-05-01
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| author | H. C. Das G. F. Burgio |
| author_facet | H. C. Das G. F. Burgio |
| author_sort | H. C. Das |
| collection | DOAJ |
| description | We investigate the effects of dark matter (DM) on neutron star (NS) properties using the neutron decay anomaly model within the relativistic mean-field (RMF) framework. Three nucleonic models (HCD0–HCD2) are developed, satisfying astrophysical constraints such as the maximum NS mass (≥<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2</mn><msub><mi>M</mi><mo>⊙</mo></msub></mrow></semantics></math></inline-formula>), the NICER mass–radius limits, and the tidal deformability constraint from the GW170817 event. The equation of states of the NS admixed with DM (DMANS) is calculated by incorporating the self-interactions between them. The macroscopic properties, such as mass, radius, and tidal deformability of the NSs, are obtained for HCD models along with five others by varying self-interaction strength. By combining NS observations with scattering cross-section constraints from galaxy clusters, we explore model-dependent trends in the DM self-interaction parameter space. While the quantitative bounds may vary with hadronic model choice, our analysis offers insights into the interplay between DM interactions and NS observables within the RMF framework. |
| format | Article |
| id | doaj-art-1885aefc39ab43d5b32af31b474d72fa |
| institution | Kabale University |
| issn | 2218-1997 |
| language | English |
| publishDate | 2025-05-01 |
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| series | Universe |
| spelling | doaj-art-1885aefc39ab43d5b32af31b474d72fa2025-08-20T03:47:58ZengMDPI AGUniverse2218-19972025-05-0111515910.3390/universe11050159Neutron Decay Anomaly and Its Effects on Neutron Star PropertiesH. C. Das0G. F. Burgio1INFN Sezione di Catania, Via Santa Sofia 64, 95123 Catania, ItalyINFN Sezione di Catania, Via Santa Sofia 64, 95123 Catania, ItalyWe investigate the effects of dark matter (DM) on neutron star (NS) properties using the neutron decay anomaly model within the relativistic mean-field (RMF) framework. Three nucleonic models (HCD0–HCD2) are developed, satisfying astrophysical constraints such as the maximum NS mass (≥<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2</mn><msub><mi>M</mi><mo>⊙</mo></msub></mrow></semantics></math></inline-formula>), the NICER mass–radius limits, and the tidal deformability constraint from the GW170817 event. The equation of states of the NS admixed with DM (DMANS) is calculated by incorporating the self-interactions between them. The macroscopic properties, such as mass, radius, and tidal deformability of the NSs, are obtained for HCD models along with five others by varying self-interaction strength. By combining NS observations with scattering cross-section constraints from galaxy clusters, we explore model-dependent trends in the DM self-interaction parameter space. While the quantitative bounds may vary with hadronic model choice, our analysis offers insights into the interplay between DM interactions and NS observables within the RMF framework.https://www.mdpi.com/2218-1997/11/5/159neutron stardark matterequation of state |
| spellingShingle | H. C. Das G. F. Burgio Neutron Decay Anomaly and Its Effects on Neutron Star Properties Universe neutron star dark matter equation of state |
| title | Neutron Decay Anomaly and Its Effects on Neutron Star Properties |
| title_full | Neutron Decay Anomaly and Its Effects on Neutron Star Properties |
| title_fullStr | Neutron Decay Anomaly and Its Effects on Neutron Star Properties |
| title_full_unstemmed | Neutron Decay Anomaly and Its Effects on Neutron Star Properties |
| title_short | Neutron Decay Anomaly and Its Effects on Neutron Star Properties |
| title_sort | neutron decay anomaly and its effects on neutron star properties |
| topic | neutron star dark matter equation of state |
| url | https://www.mdpi.com/2218-1997/11/5/159 |
| work_keys_str_mv | AT hcdas neutrondecayanomalyanditseffectsonneutronstarproperties AT gfburgio neutrondecayanomalyanditseffectsonneutronstarproperties |