Short-Range Correlations and Urca Process in Neutron Stars
Fuente:
arXiv
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| Autore principale: | |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866912084830191616 |
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| author | Sedrakian, Armen |
| author_facet | Sedrakian, Armen |
| contents | Recent measurements of high-momentum correlated neutron-proton pairs
at JLab suggest that the dense nucleonic component of the compact
stars contains a fraction of high-momentum neutron-proton pairs that
is not accounted for in the familiar Fermi-liquid theory of the
neutron-proton fluid mixture. We compute the rate of the Urca
process in compact stars taking into account the non-Fermi liquid
contributions to the proton's spectral widths induced by short-range
correlations. The Urca rate differs strongly from the Fermi-liquid
prediction at low temperatures, in particular, the high threshold on
the proton fraction precluding the Urca process in neutron stars is
replaced by a smooth increase with the proton fraction. This observation
may have a profound impact on the theories of cooling of compact
stars. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_16183 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Short-Range Correlations and Urca Process in Neutron Stars Sedrakian, Armen Nuclear Theory High Energy Astrophysical Phenomena Recent measurements of high-momentum correlated neutron-proton pairs at JLab suggest that the dense nucleonic component of the compact stars contains a fraction of high-momentum neutron-proton pairs that is not accounted for in the familiar Fermi-liquid theory of the neutron-proton fluid mixture. We compute the rate of the Urca process in compact stars taking into account the non-Fermi liquid contributions to the proton's spectral widths induced by short-range correlations. The Urca rate differs strongly from the Fermi-liquid prediction at low temperatures, in particular, the high threshold on the proton fraction precluding the Urca process in neutron stars is replaced by a smooth increase with the proton fraction. This observation may have a profound impact on the theories of cooling of compact stars. |
| title | Short-Range Correlations and Urca Process in Neutron Stars |
| topic | Nuclear Theory High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2406.16183 |