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arXiv · hep-ph/9404324

The Proximal Chiral Phase Transition

Joseph I. Kapusta·Ajit M. Srivastava
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Abstract

We consider the form of the chiral symmetry breaking piece of the effective potential in the linear sigma model. Surprisingly, it allows for a second local minimum at both zero and finite temperature. Even though chiral symmetry is not exact, and therefore is not restored in a true phase transition at finite temperature, this second minimum can nevertheless mimic many of the effects of a first order phase transition. We derive a lower limit on the height of the second minimum relative to the global minimum based on cosmological considerations; this limit is so weak as to be practically nonexistent. In high energy nuclear collisions, it may lead to observable effects in Bose-Einstein interferometry due to domain walls and to coherent pion emission.

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Joseph I. Kapusta, Ajit M. Srivastava. 1994-04-22. The Proximal Chiral Phase Transition. https://doi.org/10.1103/physrevd.50.5379

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