On the $θ$-angle physics of QCD under pressure: The strange and isospin phase diagram
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909451135483904 |
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| author | Bersini, Jahmall D'Alise, Alessandra Gambardella, Clelia Sannino, Francesco |
| author_facet | Bersini, Jahmall D'Alise, Alessandra Gambardella, Clelia Sannino, Francesco |
| contents | We unveil the impact of the $θ$-angle on the QCD phase diagram at nonzero isospin and strangeness chemical potentials for three light flavors and different quark mass ratios. We establish the phase boundaries as well as the nature of the associated phase transitions. The order parameters and the physical spectrum in the different phases are determined. We further elucidate the physics around $θ=π$ where we discover a novel parity-preserving superfluid phase. Finally, we comment on Dashen's phenomenon in the superfluid phases when varying the number of light flavors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_04261 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On the $θ$-angle physics of QCD under pressure: The strange and isospin phase diagram Bersini, Jahmall D'Alise, Alessandra Gambardella, Clelia Sannino, Francesco High Energy Physics - Phenomenology High Energy Physics - Lattice High Energy Physics - Theory Nuclear Theory We unveil the impact of the $θ$-angle on the QCD phase diagram at nonzero isospin and strangeness chemical potentials for three light flavors and different quark mass ratios. We establish the phase boundaries as well as the nature of the associated phase transitions. The order parameters and the physical spectrum in the different phases are determined. We further elucidate the physics around $θ=π$ where we discover a novel parity-preserving superfluid phase. Finally, we comment on Dashen's phenomenon in the superfluid phases when varying the number of light flavors. |
| title | On the $θ$-angle physics of QCD under pressure: The strange and isospin phase diagram |
| topic | High Energy Physics - Phenomenology High Energy Physics - Lattice High Energy Physics - Theory Nuclear Theory |
| url | https://arxiv.org/abs/2501.04261 |