Recent advances on chiral partners and patterns and the thermal f0(500) in chiral restoration
(2017) 17th International Conference on Hadron Spectroscopy and Structure, Hadron 2017 In Proceedings of Science 310.- 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... (More)
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.
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- author
- Nicola, Angel Gómez ; De Elvira, Jacobo Ruiz ; Ferreres-Solé, Silvia and Vioque-Rodríguez, Andrea
- publishing date
- 2017
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Proceedings of Science
- series title
- Proceedings of Science
- volume
- 310
- conference name
- 17th International Conference on Hadron Spectroscopy and Structure, Hadron 2017
- conference location
- Salamanca, Spain
- conference dates
- 2017-09-25 - 2017-09-29
- external identifiers
-
- scopus:85052909812
- DOI
- 10.22323/1.310.0204
- language
- English
- LU publication?
- no
- id
- a17ddca1-334a-45cc-9ca3-97133477a988
- date added to LUP
- 2018-11-19 09:10:32
- date last changed
- 2022-03-10 23:10:31
@inproceedings{a17ddca1-334a-45cc-9ca3-97133477a988, abstract = {{<p>We review recent results on chiral SU(2)<sub>L</sub> ×SU(2)<sub>R</sub> ≈ O(4) and U(1)<sub>A</sub> 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)<sub>A</sub> patterns of the chiral transition. For that purpose, susceptibilities associated with the O(4) and U(1)<sub>A</sub> 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)<sub>A</sub> partners degenerate as well. We also discuss the role of the thermal f<sub>0</sub>(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.</p>}}, author = {{Nicola, Angel Gómez and De Elvira, Jacobo Ruiz and Ferreres-Solé, Silvia and Vioque-Rodríguez, Andrea}}, booktitle = {{Proceedings of Science}}, language = {{eng}}, series = {{Proceedings of Science}}, title = {{Recent advances on chiral partners and patterns and the thermal f<sub>0</sub>(500) in chiral restoration}}, url = {{http://dx.doi.org/10.22323/1.310.0204}}, doi = {{10.22323/1.310.0204}}, volume = {{310}}, year = {{2017}}, }