Classical Decay Rates of Oscillons
| Autor: | Paul M. Saffin, Edmund J. Copeland, Mustafa A. Amin, Hong-Yi Zhang, Kaloian D. Lozanov |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
High Energy Physics - Theory Field (physics) 010308 nuclear & particles physics FOS: Physical sciences Astronomy and Astrophysics Pattern Formation and Solitons (nlin.PS) Radiation 01 natural sciences Nonlinear Sciences - Pattern Formation and Solitons 3. Good health Term (time) High Energy Physics - Phenomenology Amplitude Effective mass (solid-state physics) High Energy Physics - Phenomenology (hep-ph) Orders of magnitude (time) High Energy Physics - Theory (hep-th) Quantum electrodynamics 0103 physical sciences Scalar field Nonlinear Sciences::Pattern Formation and Solitons |
| DOI: | 10.48550/arxiv.2004.01202 |
| Popis: | Oscillons are extremely long-lived, spatially-localized field configurations in real-valued scalar field theories that slowly lose energy via radiation of scalar waves. Before their eventual demise, oscillons can pass through (one or more) exceptionally stable field configurations where their decay rate is highly suppressed. We provide an improved calculation of the non-trivial behavior of the decay rates, and lifetimes of oscillons. In particular, our calculation correctly captures the existence (or absence) of the exceptionally long-lived states for large amplitude oscillons in a broad class of potentials, including non-polynomial potentials that flatten at large field values. The key underlying reason for the improved (by many orders of magnitude in some cases) calculation is the systematic inclusion of a spacetime-dependent effective mass term in the equation describing the radiation emitted by oscillons (in addition to a source term). Our results for the exceptionally stable configurations, decay rates, and lifetime of large amplitude oscillons (in some cases $\gtrsim 10^8$ oscillations) in such flattened potentials might be relevant for cosmological applications. Comment: v2: 27 pages, 7 figures. References added, added short discussion on cosine potentials |
| Databáze: | OpenAIRE |
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