Finite density lattice QCD without extrapolations
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866909953764098048 |
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| author | Adam, Alexander Borsányi, Szabolcs Fodor, Zoltán Guenther, Jana N. Parotto, Paolo Pásztor, Attila Pirelli, Ludovica Wong, Chik Him |
| author_facet | Adam, Alexander Borsányi, Szabolcs Fodor, Zoltán Guenther, Jana N. Parotto, Paolo Pásztor, Attila Pirelli, Ludovica Wong, Chik Him |
| contents | Finite density lattice QCD usually relies on extrapolations in baryon chemical potential ($μ_B$), be it Taylor expansion, T' expansion (\cite{Borsanyi:2021sxv}) or analytical continuation. However, their range of validity is difficult to control. In the canonical formulation, the baryon density is the parameter of the system, not $μ_B$. Here we demonstrate that we can access finite density QCD in the canonical formulation with physical quark masses. We present first results with both the strangeness ($n_S$) and baryon ($n_B$) densities as parameters. Specifically, we compute the QCD pressure and chemical potentials as functions of $n_B$ and $n_S$. Our computations rely on high-statistics simulations with 2+1 4HEX-staggered fermions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_09415 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Finite density lattice QCD without extrapolations Adam, Alexander Borsányi, Szabolcs Fodor, Zoltán Guenther, Jana N. Parotto, Paolo Pásztor, Attila Pirelli, Ludovica Wong, Chik Him High Energy Physics - Lattice Finite density lattice QCD usually relies on extrapolations in baryon chemical potential ($μ_B$), be it Taylor expansion, T' expansion (\cite{Borsanyi:2021sxv}) or analytical continuation. However, their range of validity is difficult to control. In the canonical formulation, the baryon density is the parameter of the system, not $μ_B$. Here we demonstrate that we can access finite density QCD in the canonical formulation with physical quark masses. We present first results with both the strangeness ($n_S$) and baryon ($n_B$) densities as parameters. Specifically, we compute the QCD pressure and chemical potentials as functions of $n_B$ and $n_S$. Our computations rely on high-statistics simulations with 2+1 4HEX-staggered fermions. |
| title | Finite density lattice QCD without extrapolations |
| topic | High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2512.09415 |