Vector interaction bounds in NJL-like models from LQCD estimated curvature of the chiral crossover line
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| Format: | Preprint |
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2024
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| _version_ | 1866918264717705216 |
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| author | Ali, Mahammad Sabir Biswas, Deeptak Islam, Chowdhury Aminul |
| author_facet | Ali, Mahammad Sabir Biswas, Deeptak Islam, Chowdhury Aminul |
| contents | We obtain improved bounds on both the flavor-independent and -dependent vector interactions in a $2+1$-flavor Nambu\textendash Jona-Lasinio (NJL) model using the latest precise LQCD results of the curvature coefficients of the chiral crossover line. We find that these lattice estimated curvature coefficients allow for both attractive and repulsive types of interactions in both the cases. With this constrained ranges of vector interactions, we further predict the behavior of the second $(κ_2^B)$ and fourth $(κ_4^B)$ order curvature coefficients as a function of the strangeness chemical potential $(μ_S)$. We observe that the flavor mixing effects, arising from the flavor-independent vector interaction as well as from the 't Hooft interaction, play an important role in $k_2^B$. We propose that the mixing effects due to the vector interaction can be separated from those arising from the 't Hooft interaction by analyzing the behavior of $k_2^B$ as a function of $μ_S$. Finally, we locate the critical endpoint in the $T-μ_B$ plane using the model-estimated ranges of vector interactions and find the model's predictions to be consistent with the latest LQCD bounds. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_00653 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Vector interaction bounds in NJL-like models from LQCD estimated curvature of the chiral crossover line Ali, Mahammad Sabir Biswas, Deeptak Islam, Chowdhury Aminul Nuclear Theory High Energy Physics - Lattice High Energy Physics - Phenomenology We obtain improved bounds on both the flavor-independent and -dependent vector interactions in a $2+1$-flavor Nambu\textendash Jona-Lasinio (NJL) model using the latest precise LQCD results of the curvature coefficients of the chiral crossover line. We find that these lattice estimated curvature coefficients allow for both attractive and repulsive types of interactions in both the cases. With this constrained ranges of vector interactions, we further predict the behavior of the second $(κ_2^B)$ and fourth $(κ_4^B)$ order curvature coefficients as a function of the strangeness chemical potential $(μ_S)$. We observe that the flavor mixing effects, arising from the flavor-independent vector interaction as well as from the 't Hooft interaction, play an important role in $k_2^B$. We propose that the mixing effects due to the vector interaction can be separated from those arising from the 't Hooft interaction by analyzing the behavior of $k_2^B$ as a function of $μ_S$. Finally, we locate the critical endpoint in the $T-μ_B$ plane using the model-estimated ranges of vector interactions and find the model's predictions to be consistent with the latest LQCD bounds. |
| title | Vector interaction bounds in NJL-like models from LQCD estimated curvature of the chiral crossover line |
| topic | Nuclear Theory High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.00653 |