A new 4D lattice QCD equation of state: extended density coverage from a generalized $T^\prime$-expansion
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arXiv
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| Format: | Preprint |
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2025
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| author | Abuali, Ahmed Borsányi, Szabolcs Fodor, Zoltán Jahan, Johannes Kahangirwe, Micheal Parotto, Paolo Pásztor, Attila Ratti, Claudia Shah, Hitansh Trabulsi, Seth A. |
| author_facet | Abuali, Ahmed Borsányi, Szabolcs Fodor, Zoltán Jahan, Johannes Kahangirwe, Micheal Parotto, Paolo Pásztor, Attila Ratti, Claudia Shah, Hitansh Trabulsi, Seth A. |
| contents | We present a new equation of state for QCD in which the temperature $T$ and the three chemical potentials for baryon number $μ_B$, electric charge $μ_Q$ and strangeness $μ_S$ can be varied independently. This result is based on a generalization of the $T'$-expansion scheme, thanks to which the diagonal $μ_B$ extrapolation was pushed up to a baryo-chemical potential $μ_B/T \sim 3.5$ for the first time. This considerably extended the coverage of the Taylor expansion, limited to $μ_B/T < 2.5-3$. As a consequence, we are able to offer a substantially larger coverage of the four-dimensional QCD phase diagram as well, compared to previously available Taylor expansion results. Our results are based on new continuum estimated lattice results on the full set of second and fourth order fluctuations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_01881 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A new 4D lattice QCD equation of state: extended density coverage from a generalized $T^\prime$-expansion Abuali, Ahmed Borsányi, Szabolcs Fodor, Zoltán Jahan, Johannes Kahangirwe, Micheal Parotto, Paolo Pásztor, Attila Ratti, Claudia Shah, Hitansh Trabulsi, Seth A. High Energy Physics - Lattice High Energy Physics - Phenomenology We present a new equation of state for QCD in which the temperature $T$ and the three chemical potentials for baryon number $μ_B$, electric charge $μ_Q$ and strangeness $μ_S$ can be varied independently. This result is based on a generalization of the $T'$-expansion scheme, thanks to which the diagonal $μ_B$ extrapolation was pushed up to a baryo-chemical potential $μ_B/T \sim 3.5$ for the first time. This considerably extended the coverage of the Taylor expansion, limited to $μ_B/T < 2.5-3$. As a consequence, we are able to offer a substantially larger coverage of the four-dimensional QCD phase diagram as well, compared to previously available Taylor expansion results. Our results are based on new continuum estimated lattice results on the full set of second and fourth order fluctuations. |
| title | A new 4D lattice QCD equation of state: extended density coverage from a generalized $T^\prime$-expansion |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2504.01881 |