Larger Domains from Resonant Decay of Disoriented Chiral Condensates

Details Larger Domains from Resonant Decay of Disoriented Chiral Condensates Larger Domains from Resonant Decay of Disoriented Chiral Condensates

1998-01-14

arxiv.org/abs/hep-ph/9801307v2

Phys.Rev. D59 (1999) 117901

Physics

High Energy Physics

High Energy Physics - Phenomenology

4pp, 2 figs, Revtex. Minor revisions, conclusions unchanged

Scientific paper

10.1103/PhysRevD.59.117901

The decay of disoriented chiral condensates into soft pions is considered within the context of a linear sigma model. Unlike earlier analytic studies, which focused on the production of pions as the sigma field rolled down toward its new equilibrium value, here we focus on the amplification of long-wavelength pion modes due to parametric resonance as the sigma field oscillates around the minimum of its potential. This process can create larger domains of pion fluctuations than the usual spinodal decomposition process, and hence may provide a viable experimental signature for chiral symmetry breaking in relativistic heavy ion collisions; it may also better explain physically the large growth of domains found in several numerical simulations.

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