English

Signatures of QCD conductivities in heavy-ion collisions

Nuclear Theory 2026-01-21 v1 High Energy Physics - Phenomenology Nuclear Experiment

Abstract

Dissipative processes are pivotal for understanding the hydrodynamic evolution of hot and dense QCD matter created in relativistic nuclear collisions. The interplay of multiple conserved charges -- net baryon, strangeness, and electric charge -- is of particular interest. We simulate the longitudinal hydrodynamic evolution with the three diffusion currents in a hydrodynamic model with a lattice-QCD-based equation of state, NEOS-4D, and estimate rapidity distributions including diffusive corrections to the phase-space distribution in the presence of multiple charges, which ensure charge conservation at particlization. We determine the response of particle yields at midrapidity to changes in the diagonal and off-diagonal conductivities. Inversely, we find that most components of the conductivity matrix can be constrained experimentally using identified particle multiplicities at different collision energies.

Keywords

Cite

@article{arxiv.2601.12384,
  title  = {Signatures of QCD conductivities in heavy-ion collisions},
  author = {Akihiko Monnai and Grégoire Pihan and Björn Schenke and Chun Shen},
  journal= {arXiv preprint arXiv:2601.12384},
  year   = {2026}
}

Comments

16 pages, 9 figures