Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2308.05663 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909228375998464 |
|---|---|
| author | Dominguez, C. A. Loewe, Marcelo Villavicencio, Cristian Zamora, R. |
| author_facet | Dominguez, C. A. Loewe, Marcelo Villavicencio, Cristian Zamora, R. |
| contents | The nucleon axial-vector coupling constant $g_A$ is studied in the presence of an external magnetic field, and in dense nuclear environments, to emulate nuclear matter in magnetars. For this purpose we use QCD finite energy sum rules for two-current and three-current correlators, the former involving nucleon-nucleon correlators and the latter involving proton-axial-neutron currents. As a result, the axial-vector coupling constant decreases both with baryon density as well as with magnetic field. The axial-vector coupling evaluated with baryon density near the nuclear density $ρ_0$ leads to $g_A^*\approx 0.92$. In the presence of magnetic fields $g_A$ decreases in general, but $g_A^*$ does not show significant changes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_05663 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Nucleon axial-vector coupling constant in magnetar environments Dominguez, C. A. Loewe, Marcelo Villavicencio, Cristian Zamora, R. High Energy Physics - Phenomenology Nuclear Theory The nucleon axial-vector coupling constant $g_A$ is studied in the presence of an external magnetic field, and in dense nuclear environments, to emulate nuclear matter in magnetars. For this purpose we use QCD finite energy sum rules for two-current and three-current correlators, the former involving nucleon-nucleon correlators and the latter involving proton-axial-neutron currents. As a result, the axial-vector coupling constant decreases both with baryon density as well as with magnetic field. The axial-vector coupling evaluated with baryon density near the nuclear density $ρ_0$ leads to $g_A^*\approx 0.92$. In the presence of magnetic fields $g_A$ decreases in general, but $g_A^*$ does not show significant changes. |
| title | Nucleon axial-vector coupling constant in magnetar environments |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2308.05663 |