• Open Access

Patterns and partners for chiral symmetry restoration

A. Gómez Nicola and J. Ruiz de Elvira
Phys. Rev. D 97, 074016 – Published 16 April 2018

Abstract

We present and analyze a new set of Ward Identities which shed light on the distinction between different patterns of chiral symmetry restoration in QCD, namely O(4) vs O(4)×U(1)A. The degeneracy of chiral partners for all scalar and pseudoscalar meson nonet members is studied through their corresponding correlators. Around chiral symmetry degeneration of O(4) partners, our analysis predicts that U(1)A partners are also degenerated. Our analysis also leads to I=1/2 scalar-pseudoscalar partner degeneration at exact chiral restoration and supports ideal mixing between the ηη and the f0(500)f0(980) mesons at O(4)×U(1)A restoration, with a possible range where the pseudoscalar mixing vanishes if the two transitions are well separated. We test our results with lattice data and provide further relevant observables regarding chiral and U(1)A restoration for future lattice and model analyses.

  • Figure
  • Received 23 January 2018

DOI:https://doi.org/10.1103/PhysRevD.97.074016

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Particles & FieldsNuclear Physics

Authors & Affiliations

A. Gómez Nicola1,* and J. Ruiz de Elvira2,3,†

  • 1Departamento de Física Teórica and UPARCOS, Univ. Complutense, 28040 Madrid, Spain
  • 2Helmholtz-Institut für Strahlen und Kernphysik, Universität Bonn, D-53115 Bonn, Germany
  • 3Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland

  • *gomez@fis.ucm.es
  • elvira@itp.unibe.ch

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Issue

Vol. 97, Iss. 7 — 1 April 2018

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