arXiv:hep-ph/9711452·v1·High Energy Physics — Phenomenology

Pion and Eta Strings

Xinmin Zhang · Tao Huang · Robert H. Brandenberger (Institute for High Energy Physics, Academia Sinica, and Brown University)

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Abstract

In this paper we construct a string-like classical solution, the pion-string, in the linear sigma model. We then study the stability of the pion-string, and find that it is unstable in the parameter space allowed experimentally. We also speculate on the existance of an unstable eta-string, associated with spontaneous breakdown of the anomalous $U_{A} (1)$ symmetry in QCD at high temperatures. The implications of the pion and eta strings for cosmology and heavy ion collisions are briefly mentioned.

Comments: 5 pages, LATEX