### Abstract

The nucleation and evolution of bubbles are investigated in the model of an 0(3)-symmetric scalar field coupled to gravity in the high temperature limit. It is shown that, in addition to the well-known bubble of which the inside region is the true vacuum, there exists another decay channel at high temperature which is described by a new solution such that a false vacuum region like a global monopole remains at the center of a bubble. The value of the Euclidean action of this bubble is higher than that of the ordinary bubble; however, the production rate of it can be considerable for a certain range of scalar potentials.

Original language | English |
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Pages (from-to) | 453-476 |

Number of pages | 24 |

Journal | Nuclear Physics B |

Volume | 481 |

Issue number | 1-2 |

Publication status | Published - 1996 Jan 1 |

### Keywords

- Cosmological phase transition
- Finite-temperature field theory
- General relativity

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

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## Cite this

Kim, Y., Maeda, K. I., & Sakai, N. (1996). Monopole bubble in early universe.

*Nuclear Physics B*,*481*(1-2), 453-476.