Scale without conformal symmetry in hydrodynamics
High Energy Physics - Theory
2025-09-23 v2
Abstract
Scale without conformal symmetry corresponds to an inhomogeneous conservation equation for the virial current sourced by the trace of the energy-momentum tensor. Fluids that are just scale-invariant differ qualitatively from their conformal counterparts, and generic dissipation effects relax the hydrodynamic response over sufficiently long time scales. Remarkably, this holds true already at the ideal order. Spontaneously broken scale symmetry does not, in general, add any new mode to the hydrodynamic sector.
Cite
@article{arxiv.2507.22247,
title = {Scale without conformal symmetry in hydrodynamics},
author = {Evangelos Afxonidis and Jewel Kumar Ghosh and Daniele Musso and Daniel Naegels and Ignacio Salazar Landea},
journal= {arXiv preprint arXiv:2507.22247},
year = {2025}
}
Comments
26 pages; v2 contains some revised comments on the symmetries of the theory