Spectral properties of pseudo-scalar mesons through the QCD chiral crossover
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866916518592249856 |
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| author | Lowdon, Peter Philipsen, Owe |
| author_facet | Lowdon, Peter Philipsen, Owe |
| contents | 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_08371 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spectral properties of pseudo-scalar mesons through the QCD chiral crossover Lowdon, Peter Philipsen, Owe High Energy Physics - Phenomenology High Energy Physics - Lattice 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. |
| title | Spectral properties of pseudo-scalar mesons through the QCD chiral crossover |
| topic | High Energy Physics - Phenomenology High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2412.08371 |