Which chiral symmetry is restored in high temperature quantum chromodynamics?

Claude Bernard, Tom Blum, Carleton DeTar, Steven Gottlieb, Urs M. Heller, James E. Hetrick, K. Rummukainen, R. Sugar, D. Toussaint, Matthew Wingate

Research output: Contribution to journalArticlepeer-review

69 Scopus citations


Sigma models for the high temperature phase transition in quantum chromodynamics suggest that at high temperature the SU(Nf) × SU(Nf) chiral symmetry becomes exact, but the anomalous axial U(1) symmetry need not be restored. In numerical lattice simulations, traditional methods for detecting symmetry restoration have sought multiplets in the screening mass spectrum. However, these methods were imprecise and the results, so far, incomplete. With improved statistics and methodology, we are now able to offer evidence for a restoration of the SU(2) × SU(2) chiral symmetry just above the crossover, but not of the axial U(1) chiral symmetry.

Original languageEnglish (US)
Pages (from-to)598-601
Number of pages4
JournalPhysical review letters
Issue number4
StatePublished - Jan 27 1997

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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