Cosmic Strings and Domain Walls in Models with Goldstone and Pseudo-Goldstone Bosons
- 28 June 1982
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 48 (26), 1867-1870
- https://doi.org/10.1103/physrevlett.48.1867
Abstract
Topological vacuum structures are investigated in models with spontaneous breaking of exact and approximate global symmetries. The cosmological evolution of the structure is discussed. A spontaneous breaking of an exact global U(1) symmetry gives rise to vacuum strings which can produce cosmological density fluctuations leading to galaxy formation. In a simplified axion model, the vacuum structures are strings connected by domain walls. They decay before they can dominate the universe.Keywords
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