Probing the impact of Delta-Baryons on Nuclear Matter and Non-Radial Oscillations in Neutron Stars
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| Format: | Preprint |
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2023
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| _version_ | 1866912671099518976 |
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| author | Kalita, Probit Jyoti Routaray, Pinku Ghosh, Sayantan Kumar, Bharat Agrawal, Bijay K. |
| author_facet | Kalita, Probit Jyoti Routaray, Pinku Ghosh, Sayantan Kumar, Bharat Agrawal, Bijay K. |
| contents | The presence of heavy baryons, such as $Δ$-baryons and hyperons can significantly impact various properties of Neutron Stars (NSs), like oscillation frequencies, dimensionless tidal deformability, mass, and radii. We explored these effects within the Density-Dependent Relativistic Mean Field formalism. Our analysis considered $Δ$-admixed NS matter in both hypernuclear and hyperon-free scenarios, providing insights into particle compositions and their effects on NS properties. Our study of non-radial $f$-mode oscillations revealed a distinct increase in frequency due to the additional baryons. The degree of increase was significantly influenced by the meson-baryon coupling strengths. Notably, the coupling between $Δ$-resonances and $σ$-mesons played a highly influential role. In some cases, it led to an approximately 20\% increase in the $f$-mode oscillation frequency of canonical NSs. These couplings also affect other bulk properties of NSs, including mass, radii, and dimensionless tidal deformability ($Λ$). Comparing our results with available observational data from pulsars (NICER) and gravitational waves (LIGO-VIRGO collaboration), we found strong agreement, particularly concerning $Λ$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2308_09008 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Probing the impact of Delta-Baryons on Nuclear Matter and Non-Radial Oscillations in Neutron Stars Kalita, Probit Jyoti Routaray, Pinku Ghosh, Sayantan Kumar, Bharat Agrawal, Bijay K. Nuclear Theory General Relativity and Quantum Cosmology The presence of heavy baryons, such as $Δ$-baryons and hyperons can significantly impact various properties of Neutron Stars (NSs), like oscillation frequencies, dimensionless tidal deformability, mass, and radii. We explored these effects within the Density-Dependent Relativistic Mean Field formalism. Our analysis considered $Δ$-admixed NS matter in both hypernuclear and hyperon-free scenarios, providing insights into particle compositions and their effects on NS properties. Our study of non-radial $f$-mode oscillations revealed a distinct increase in frequency due to the additional baryons. The degree of increase was significantly influenced by the meson-baryon coupling strengths. Notably, the coupling between $Δ$-resonances and $σ$-mesons played a highly influential role. In some cases, it led to an approximately 20\% increase in the $f$-mode oscillation frequency of canonical NSs. These couplings also affect other bulk properties of NSs, including mass, radii, and dimensionless tidal deformability ($Λ$). Comparing our results with available observational data from pulsars (NICER) and gravitational waves (LIGO-VIRGO collaboration), we found strong agreement, particularly concerning $Λ$. |
| title | Probing the impact of Delta-Baryons on Nuclear Matter and Non-Radial Oscillations in Neutron Stars |
| topic | Nuclear Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2308.09008 |