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arXiv · 2412.08371

Spectral properties of pseudo-scalar mesons through the QCD chiral crossover

Peter Lowdon·Owe Philipsen
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Abstract

We summarise recent progress towards the non-perturbative determination of thermal spectral functions for pseudo-scalar mesons in QCD by exploiting constraints imposed by micro-causality at finite temperature. For temperatures not much above the vacuum particle mass, continuous contributions from scattering, Landau damping and collective excitations are found to be negligible. This allows for a quantitative description of spatial and temporal lattice correlators in terms of thermoparticles, i.e.~vacuum excitations modified by medium effects, with resonance-like structures persisting for a range above the chiral crossover.

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Peter Lowdon, Owe Philipsen. 2024-12-11. Spectral properties of pseudo-scalar mesons through the QCD chiral crossover. https://arxiv.org/abs/2412.08371

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