Evolution of spherical domain walls in solitonic symmetron models
| Autor: | Nematollah Riazi, Francisco S. N. Lobo, Marzieh Peyravi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics High Energy Physics - Theory Annihilation 010308 nuclear & particles physics Bubble Degenerate energy levels Scalar (mathematics) FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences General Relativity and Quantum Cosmology Physics::Fluid Dynamics Classical mechanics High Energy Physics - Theory (hep-th) 0103 physical sciences Symmetry breaking Astrophysics - High Energy Astrophysical Phenomena 010303 astronomy & astrophysics |
| Popis: | In this work, inspired by the symmetron model, we analyse the evolution of spherical domain walls by considering specific potentials that ensure symmetry breaking and the occurrence of degenerate vacua that are necessary for the formation of domain walls. By considering a simple analytical model of spherical domain wall collapse in vacuum, it is shown that this model fits the more accurate numerical results very well until full collapse, after which oscillations and scalar radiation take place. Furthermore, we explore the effect of a central non-relativistic matter lump on the evolution of a spherical domain wall and show that the central lump can prevent the full collapse and annihilation of the domain wall bubble, due to the repulsion between the domain wall and matter over-density within the adopted symmetron inspired model. 15 pages, 14 figures. V2: 18 pages, 18 figures, extensive discussion added; published in PRD |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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