Supercooled Goldstone Bosons at the QCD Chiral Phase Transition
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866915671270490112 |
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| author | Florio, Adrien Grossi, Eduardo Mazeliauskas, Aleksas Soloviev, Alexander Teaney, Derek |
| author_facet | Florio, Adrien Grossi, Eduardo Mazeliauskas, Aleksas Soloviev, Alexander Teaney, Derek |
| contents | We discuss a universal non-equilibrium enhancement of long-wavelength Goldstone bosons induced by quenches to the broken phase in Model G -- the dynamical universality class of an $O(4)$-antiferromagnet and the chiral phase transition in QCD. Scaling arguments for the coarsening dynamics describing the formation of the chiral condensate predict a parametric enhancement in the infrared spectra of Goldstones, a prediction confirmed by stochastic simulations of the transition. The details of the enhancement are determined by the non-linear dynamics of a superfluid effective theory, which is a limit of Model G reflecting the broken $O(4)$ symmetry. Our results translate to a parametric enhancement of low-momentum pions in heavy-ion collisions at the LHC, which are underpredicted in current hydrodynamic models without critical dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_03516 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Supercooled Goldstone Bosons at the QCD Chiral Phase Transition Florio, Adrien Grossi, Eduardo Mazeliauskas, Aleksas Soloviev, Alexander Teaney, Derek High Energy Physics - Phenomenology High Energy Physics - Lattice Nuclear Experiment Nuclear Theory We discuss a universal non-equilibrium enhancement of long-wavelength Goldstone bosons induced by quenches to the broken phase in Model G -- the dynamical universality class of an $O(4)$-antiferromagnet and the chiral phase transition in QCD. Scaling arguments for the coarsening dynamics describing the formation of the chiral condensate predict a parametric enhancement in the infrared spectra of Goldstones, a prediction confirmed by stochastic simulations of the transition. The details of the enhancement are determined by the non-linear dynamics of a superfluid effective theory, which is a limit of Model G reflecting the broken $O(4)$ symmetry. Our results translate to a parametric enhancement of low-momentum pions in heavy-ion collisions at the LHC, which are underpredicted in current hydrodynamic models without critical dynamics. |
| title | Supercooled Goldstone Bosons at the QCD Chiral Phase Transition |
| topic | High Energy Physics - Phenomenology High Energy Physics - Lattice Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2504.03516 |