Parity doublets and chiral symmetry restoration in baryon spectrum

Details Parity doublets and chiral symmetry restoration in baryon spectrum Parity doublets and chiral symmetry restoration in baryon spectrum

1999-08-02

arxiv.org/abs/hep-ph/9908207v3

Phys.Lett.B475:329-334,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 6 pp. The final version of the paper to appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(00)00096-4

It is argued that an appearance of the near parity doublets in the upper part of the light baryon spectrum is an evidence for the chiral symmetry restoration in the regime where a typical momentum of quarks is around the chiral symmetry restoration scale. At high enough baryon excitation energy the nontrivial gap solution, which signals the chiral symmetry breaking regime, disappears and the chiral symmetry should be restored. Thus one observes a phase transition in the upper part of the light baryon spectrum. The average kinetic energy of the constituent quarks in this region is just around the critical one $3T_c$.

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