Density Dependence of the Symmetry Energy in the Post PREX-CREX Era
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2023
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866909088875544576 |
|---|---|
| author | Reed, Brendan T. Fattoyev, F. J. Horowitz, C. J. Piekarewicz, J. |
| author_facet | Reed, Brendan T. Fattoyev, F. J. Horowitz, C. J. Piekarewicz, J. |
| contents | The recently published CREX results suggest a rather peculiar picture for the density dependence of the symmetry energy. Whereas PREX favors a large neutron skin thickness in $^{208}$Pb, thereby suggesting a stiff equation of state, CREX suggests instead a much softer equation of state. This discrepancy has caused a large spur in the theoretical community since no model has been able to simultaneously reproduce within $1σ$ the PREX and CREX results. Motivated by a novel correlation between a CREX observable and a combination of bulk symmetry energy parameters, we calibrate three new covariant energy density functionals that reproduce binding energies and charge radii of spherical nuclei - and also accommodate the constraints imposed by PREX and CREX. Given that these models suggest a stiff equation of state at high densities, predictions for neutron star properties are also discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_19376 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Density Dependence of the Symmetry Energy in the Post PREX-CREX Era Reed, Brendan T. Fattoyev, F. J. Horowitz, C. J. Piekarewicz, J. Nuclear Theory The recently published CREX results suggest a rather peculiar picture for the density dependence of the symmetry energy. Whereas PREX favors a large neutron skin thickness in $^{208}$Pb, thereby suggesting a stiff equation of state, CREX suggests instead a much softer equation of state. This discrepancy has caused a large spur in the theoretical community since no model has been able to simultaneously reproduce within $1σ$ the PREX and CREX results. Motivated by a novel correlation between a CREX observable and a combination of bulk symmetry energy parameters, we calibrate three new covariant energy density functionals that reproduce binding energies and charge radii of spherical nuclei - and also accommodate the constraints imposed by PREX and CREX. Given that these models suggest a stiff equation of state at high densities, predictions for neutron star properties are also discussed. |
| title | Density Dependence of the Symmetry Energy in the Post PREX-CREX Era |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2305.19376 |