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Phase Transition in Hot Pion Matter

A. Kostyuk·M. Gorenstein·H. Stoecker·W. Greiner
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Abstract

The equation of state for the pion gas is analyzed within the third virial approximation. The second virial coefficient is found from the pion-pion- scattering data, while the third one is considered as a free parameter. The proposed model leads to a first-order phase transition from the pion gas to a more dense phase at the temperature T_pt < 136 MeV. Due to relatively low temperature this phase transition cannot be related to the deconfinement. This suggests that a new phase of hadron matter - 'hot pion liquid' - may exist.

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A. Kostyuk, M. Gorenstein, H. Stoecker, W. Greiner. 2000-12-14. Phase Transition in Hot Pion Matter. https://doi.org/10.1016/s0370-2693(01)00082-x

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