Does hot QCD have a conformal manifold in the chiral limit?
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Acceso en línea: | |
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| _version_ | 1866915937547976704 |
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| author | Chen, Shi Cherman, Aleksey Pisarski, Robert D. |
| author_facet | Chen, Shi Cherman, Aleksey Pisarski, Robert D. |
| contents | Recent lattice evidence suggests the chiral phase transition in QCD is second-order for $N_f \ge 2$ massless flavors. We constrain CFT descriptions of a critical line in temperature $T$ and imaginary baryon chemical potential $θ_B = iμ_B/T$. An 't Hooft anomaly at general $θ_B$ constrains the transition even at $θ_B = 0$, leaving only three minimal scenarios. The best-motivated scenario for $N_f\ge3$, and perhaps also $N_f = 2$, is beyond Ginzburg-Landau, featuring a conformal manifold of $θ_B$-dependent universality classes with an exactly marginal operator related to baryon density. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_09977 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Does hot QCD have a conformal manifold in the chiral limit? Chen, Shi Cherman, Aleksey Pisarski, Robert D. High Energy Physics - Theory High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Theory Recent lattice evidence suggests the chiral phase transition in QCD is second-order for $N_f \ge 2$ massless flavors. We constrain CFT descriptions of a critical line in temperature $T$ and imaginary baryon chemical potential $θ_B = iμ_B/T$. An 't Hooft anomaly at general $θ_B$ constrains the transition even at $θ_B = 0$, leaving only three minimal scenarios. The best-motivated scenario for $N_f\ge3$, and perhaps also $N_f = 2$, is beyond Ginzburg-Landau, featuring a conformal manifold of $θ_B$-dependent universality classes with an exactly marginal operator related to baryon density. |
| title | Does hot QCD have a conformal manifold in the chiral limit? |
| topic | High Energy Physics - Theory High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2603.09977 |