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Thermal hadron resonances in chiral and $U(1)_A$ restoration

We review recent work on thermal resonances and their connection with chiral symmetry and $U(1)_A$ restoration within the QCD phase diagram. In particular, the $f_0(500)$ and $K_0^* (700)$ states generated from $ππ$ and $πK$ scattering within Unitarized Chiral Perturbation Theory (ChPT) at finite temperature allow one to describe scalar susceptibilities, which combined with Ward Identities yield interesting conclusions regarding the interplay between chiral and $U(1)_A$ restoration, key to understand the nature of the transition

preprint2022arXivOpen access
Angel Gómez NicolaJacobo Ruiz de ElviraAndrea Vioque-Rodríguez
hep-ph
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Open access3 authors1 topic
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Angel Gómez NicolaJacobo Ruiz de ElviraAndrea Vioque-Rodríguez

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