Abstract:
We discuss a universal nonequilibrium enhancement of long-wavelength Goldstone bosons induced by quenches to the broken phase in Model Gâthe dynamical universality class of an đâĄ(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 Goldstone bosons, a prediction confirmed by stochastic simulations of the transition. The details of the enhancement are determined by the nonlinear dynamics of a superfluid effective theory, which is a limit of Model G reflecting the broken đâĄ(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.
A. Florio, E. Grossi, A. Mazeliauskas, A. Soloviev, D. Teaney, âSupercooled Goldstone Bosons
at the QCD Chiral Phase Transitionâ, Phys. Rev. Lett. 135, 242303 (2025).
https://journals.aps.org/prl/abstract/10.1103/wyn4-ncdc
Related to Project A01