Supercooled Goldstones at the QCD chiral phase transition

Abstract:

We discuss the universal non-equilibrium enhancement of long-wavelength Goldstone bosons induced by quenches to broken phase in Model G — the dynamical universality class of an  -antiferromagnet and chiral QCD phase transition. Generic scaling arguments predict a parametric enhancement in the infrared spectra of Goldstones, which is confirmed by fully-fledged stochastic simulations. 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   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.

A. Florio, E. Grossi, A. Mazeliauskas, A. Soloviev, D. Teaney, „Supercooled Goldstones at the
QCD chiral phase transition“, 4. Apr. 2025, arXiv:2504.03516 (2025).

https://arxiv.org/abs/2504.03516

Related to Project A01