Recent advances on chiral partners and patterns and the thermal f0 (500) in chiral restoration

Gómez Nicola, Ángel; Ruiz de Elvira, Jacobo; Ferreres-Solé, Silvia; Vioque-Rodríguez, Andrea (20 March 2018). Recent advances on chiral partners and patterns and the thermal f0 (500) in chiral restoration. PoS - proceedings of science. Trieste, Italy: Scuola Internazionale Superiore di Studi Avanzati SISSA 10.22323/1.310.0204

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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.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Ruiz de Elvira Carrascal, Jacobo

Subjects:

500 Science > 530 Physics

ISSN:

1824-8039

Publisher:

Scuola Internazionale Superiore di Studi Avanzati SISSA

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

30 Aug 2018 16:06

Last Modified:

24 Oct 2019 03:41

Publisher DOI:

10.22323/1.310.0204

ArXiv ID:

1712.00074

BORIS DOI:

10.7892/boris.119662

URI:

https://boris.unibe.ch/id/eprint/119662

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