Skip to main content

Research Repository

Advanced Search

Classical decay rates of oscillons

Zhang, Hong-Yi; Amin, Mustafa A.; Copeland, Edmund J.; Saffin, Paul M.; Lozanov, Kaloian D.

Authors

Hong-Yi Zhang

Mustafa A. Amin

Kaloian D. Lozanov



Abstract

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 > 10^8 oscillations) in such flattened potentials might be relevant for cosmological applications.

Citation

Zhang, H., Amin, M. A., Copeland, E. J., Saffin, P. M., & Lozanov, K. D. (2020). Classical decay rates of oscillons. Journal of Cosmology and Astroparticle Physics, 2020(07), 055-055. https://doi.org/10.1088/1475-7516/2020/07/055

Journal Article Type Article
Acceptance Date Jun 29, 2020
Online Publication Date Jul 27, 2020
Publication Date 2020-07
Deposit Date Jul 29, 2020
Publicly Available Date Jul 28, 2021
Journal Journal of Cosmology and Astroparticle Physics
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 2020
Issue 07
Pages 055-055
DOI https://doi.org/10.1088/1475-7516/2020/07/055
Keywords Astronomy and Astrophysics
Public URL https://nottingham-repository.worktribe.com/output/4794354
Publisher URL https://iopscience.iop.org/article/10.1088/1475-7516/2020/07/055

Files





You might also like



Downloadable Citations