Phase Transition in Hot Pion Matter

Details Phase Transition in Hot Pion Matter Phase Transition in Hot Pion Matter

2000-10-09

arxiv.org/abs/hep-ph/0010076v2

Phys.Lett. B500 (2001) 273-278

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, Latex, 4 PS-figures. V2: A few misprints are corrected. Acknowledgments are added

Scientific paper

10.1016/S0370-2693(01)00082-X

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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