Monopole inflation in Brans-Dicke theory

Nobuyuki Sakai; Jun'ichi Yokoyama; Kei Ichi Maeda

doi:10.1103/PhysRevD.59.103504

Monopole inflation in Brans-Dicke theory

Nobuyuki Sakai^*, Jun'ichi Yokoyama, Kei Ichi Maeda

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

According to previous work, topological defects expand exponentially without end if the vacuum expectation value of the Higgs field is of the order of the Planck mass. We extend the study of inflating topological defects to Brans-Dicke gravity. With the help of numerical simulations we investigate the dynamics and spacetime structure of a global monopole. Contrary to the case of Einstein gravity, any inflating monopole eventually shrinks and takes a stable configuration. We also discuss cosmological constraints on the model parameters.

Original language	English
Article number	103504
Pages (from-to)	1-8
Number of pages	8
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	59
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevD.59.103504
Publication status	Published - 1999 May 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.59.103504

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abstract = "According to previous work, topological defects expand exponentially without end if the vacuum expectation value of the Higgs field is of the order of the Planck mass. We extend the study of inflating topological defects to Brans-Dicke gravity. With the help of numerical simulations we investigate the dynamics and spacetime structure of a global monopole. Contrary to the case of Einstein gravity, any inflating monopole eventually shrinks and takes a stable configuration. We also discuss cosmological constraints on the model parameters.",

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AU - Yokoyama, Jun'ichi

AU - Maeda, Kei Ichi

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AB - According to previous work, topological defects expand exponentially without end if the vacuum expectation value of the Higgs field is of the order of the Planck mass. We extend the study of inflating topological defects to Brans-Dicke gravity. With the help of numerical simulations we investigate the dynamics and spacetime structure of a global monopole. Contrary to the case of Einstein gravity, any inflating monopole eventually shrinks and takes a stable configuration. We also discuss cosmological constraints on the model parameters.

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Monopole inflation in Brans-Dicke theory

Abstract

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