Recent advances on chiral partners and patterns and the thermal f0 (500) in chiral restoration
Publisher DOI
Abstract
We review recent results on chiral SU (2)L × SU (2)R ≈ O(4) and U (1)A symmetry restoration in QCD. In particular, we discuss how Ward Identities allow one to derive general results on partner degeneration, which shed light on the distinction between the O(4) and O(4)×U(1)A patterns of the chiral transition. For that purpose, susceptibilities associated with the O(4) and U(1)A symmetries are studied. From this analysis we conclude that in the ideal regime of exact O(4) restoration (formally achieved in the limit of two massless flavours), U (1)A partners degenerate as well. We also discuss the role of the thermal f0(500) state to describe thermodynamic observables sensitive to chiral restoration, such as the scalar susceptibility. We pay special attention to the consistency of our results with recent lattice analysis.
Date Issued
2018-03-20
Publication Type
Conference Item
Subject(s)
Language(s)
en
Author(s)
Gómez Nicola, Ángel | |
Ferreres-Solé, Silvia | |
Vioque-Rodríguez, Andrea |
Additional Credits
Journal
PoS - proceedings of science
Publisher
Scuola Internazionale Superiore di Studi Avanzati SISSA
ISSN
1824-8039
Access(Rights)
open.access