Impact of QCD sum rules coupling constants on neutron stars structure
Abstract We present a detailed investigation on the structure of neutron stars, incorporating the presence of hyperons within a relativistic model under the mean-field approximation. Employing coupling constants derived from QCD sum rules, we explore the particle fraction in beta equilibrium and est...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-06-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14417-1 |
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| author | F. Moradi Jangal H. R. Moshfegh K. Azizi |
| author_facet | F. Moradi Jangal H. R. Moshfegh K. Azizi |
| author_sort | F. Moradi Jangal |
| collection | DOAJ |
| description | Abstract We present a detailed investigation on the structure of neutron stars, incorporating the presence of hyperons within a relativistic model under the mean-field approximation. Employing coupling constants derived from QCD sum rules, we explore the particle fraction in beta equilibrium and establish the mass-radius relationship for neutron stars with hyperonic matter. Additionally, we compute the stellar Love number ( $${\mathcal {K}}_{2}$$ K 2 ) and the tidal deformability parameter ( $$\varLambda $$ Λ ), providing valuable insights into the dynamical properties of these celestial objects. Through comparison with theoretical predictions and observational data, our results exhibit good agreement, affirming the validity of our approach. These findings contribute significantly to refining the understanding of neutron star physics, particularly in environments containing hyperons, and offer essential constraints on the equation of state governing such extreme astrophysical conditions. |
| format | Article |
| id | doaj-art-eccc67267f3643b4abd8f4deee7b165d |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-eccc67267f3643b4abd8f4deee7b165d2025-08-20T03:24:52ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-06-0185611310.1140/epjc/s10052-025-14417-1Impact of QCD sum rules coupling constants on neutron stars structureF. Moradi Jangal0H. R. Moshfegh1K. Azizi2Department of Physics, University of TehranDepartment of Physics, University of TehranDepartment of Physics, University of TehranAbstract We present a detailed investigation on the structure of neutron stars, incorporating the presence of hyperons within a relativistic model under the mean-field approximation. Employing coupling constants derived from QCD sum rules, we explore the particle fraction in beta equilibrium and establish the mass-radius relationship for neutron stars with hyperonic matter. Additionally, we compute the stellar Love number ( $${\mathcal {K}}_{2}$$ K 2 ) and the tidal deformability parameter ( $$\varLambda $$ Λ ), providing valuable insights into the dynamical properties of these celestial objects. Through comparison with theoretical predictions and observational data, our results exhibit good agreement, affirming the validity of our approach. These findings contribute significantly to refining the understanding of neutron star physics, particularly in environments containing hyperons, and offer essential constraints on the equation of state governing such extreme astrophysical conditions.https://doi.org/10.1140/epjc/s10052-025-14417-1 |
| spellingShingle | F. Moradi Jangal H. R. Moshfegh K. Azizi Impact of QCD sum rules coupling constants on neutron stars structure European Physical Journal C: Particles and Fields |
| title | Impact of QCD sum rules coupling constants on neutron stars structure |
| title_full | Impact of QCD sum rules coupling constants on neutron stars structure |
| title_fullStr | Impact of QCD sum rules coupling constants on neutron stars structure |
| title_full_unstemmed | Impact of QCD sum rules coupling constants on neutron stars structure |
| title_short | Impact of QCD sum rules coupling constants on neutron stars structure |
| title_sort | impact of qcd sum rules coupling constants on neutron stars structure |
| url | https://doi.org/10.1140/epjc/s10052-025-14417-1 |
| work_keys_str_mv | AT fmoradijangal impactofqcdsumrulescouplingconstantsonneutronstarsstructure AT hrmoshfegh impactofqcdsumrulescouplingconstantsonneutronstarsstructure AT kazizi impactofqcdsumrulescouplingconstantsonneutronstarsstructure |