The Proximal Chiral Phase Transition

Details The Proximal Chiral Phase Transition The Proximal Chiral Phase Transition

1994-04-22

arxiv.org/abs/hep-ph/9404324v1

Phys.Rev. D50 (1994) 5379-5388

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages (LATEX), 6 figures in postscript (uuencoded, compressed tar file included at the end of the paper), NSF-ITP-94-28, NU

Scientific paper

10.1103/PhysRevD.50.5379

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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