Coupled nuclear and leptonic longitudinal collective modes in neutron star matter : a covariant Vlasov approach
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866913176159780864 |
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| author | Rabhi, Aziz Boukari, Olfa Avancini, Sidney S. Providência, Constança |
| author_facet | Rabhi, Aziz Boukari, Olfa Avancini, Sidney S. Providência, Constança |
| contents | A covariant relativistic approach based on the Vlasov equation is used to study collective modes in neutron-star matter. The analysis is carried out within relativistic mean-field models describing charge-neutral and $β$-equilibrated matter composed of neutrons, protons, electrons, and muons. We investigate the conditions under which nuclear collective excitations couple to electron and muon plasmon modes, a phenomenon relevant for neutron stars and supernova matter. The study is undertaken considering relativistic mean field models with different isoscalar and isovector properties. It is shown that the nuclear-leptonic coupling can be sufficiently strong to modify the onset of nuclear collective modes and to affect their isoscalar or isovector character. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2606_00810 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Coupled nuclear and leptonic longitudinal collective modes in neutron star matter : a covariant Vlasov approach Rabhi, Aziz Boukari, Olfa Avancini, Sidney S. Providência, Constança Nuclear Theory High Energy Astrophysical Phenomena A covariant relativistic approach based on the Vlasov equation is used to study collective modes in neutron-star matter. The analysis is carried out within relativistic mean-field models describing charge-neutral and $β$-equilibrated matter composed of neutrons, protons, electrons, and muons. We investigate the conditions under which nuclear collective excitations couple to electron and muon plasmon modes, a phenomenon relevant for neutron stars and supernova matter. The study is undertaken considering relativistic mean field models with different isoscalar and isovector properties. It is shown that the nuclear-leptonic coupling can be sufficiently strong to modify the onset of nuclear collective modes and to affect their isoscalar or isovector character. |
| title | Coupled nuclear and leptonic longitudinal collective modes in neutron star matter : a covariant Vlasov approach |
| topic | Nuclear Theory High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2606.00810 |