The chicken or the egg; or Who ordered the chiral phase transition?

Details The chicken or the egg; or Who ordered the chiral phase transition? The chicken or the egg; or Who ordered the chiral phase transition?

2001-01-04

arxiv.org/abs/hep-ph/0101040v2

Phys.Rev. D63 (2001) 116007

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 7 figures, comments about chiral symmetry at finite nuclear density are added

Scientific paper

10.1103/PhysRevD.63.116007

We draw an analogy between the deconfining transition in the 2+1 dimensional Georgi-Glashow model and the chiral phase transition in 3+1 dimensional QCD. Based on the detailed analysis of the former (hep-th/0010201) we suggest that the chiral symmetry restoration in QCD at high temperature is driven by the thermal ensemble of baryons and anti-baryons. The chiral symmetry is restored when roughly half of the volume is occupied by the baryons. Surprisingly enough, even though baryons are rather heavy, a crude estimate for the critical temperature gives $T_c=180$ Mev. In this scenario the binding of the instantons is not the cause but rather a consequence of the chiral symmetry restoration.

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