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Radiation from cosmic string standing waves
1Institute of Cosmology, Department of Physics and Astronomy, Tufts University, Medford, Massachusetts 02155, USA.
Physical Review Letters
|September 16, 2000
Summary
Simulations of Abelian-Higgs cosmic strings show radiation rates falling exponentially with wavelength. This rapid fall challenges scaling solutions and cosmic ray constraints on cosmic string theories.
Area of Science:
- Cosmology
- Particle Physics
- Theoretical Physics
Background:
- Cosmic strings are hypothetical topological defects.
- Abelian-Higgs models describe fundamental forces.
- Understanding cosmic string radiation is crucial for cosmology.
Purpose of the Study:
- Simulate large-amplitude standing waves on Abelian-Higgs cosmic strings.
- Investigate the radiation rate dependence on wavelength.
- Evaluate implications for cosmic string theory constraints.
Main Methods:
- Classical lattice field theory simulations.
- Modeling of standing waves on cosmic strings.
- Analysis of radiation rate and wavelength relationship.
Main Results:
- Radiation rate exhibits exponential fall with wavelength.
- Results align with Moore and Shellard, but diverge from Vincent et al.
- Observed radiation fall is too rapid for scaling solutions.
Conclusions:
- Direct particle radiation from string length is unlikely to sustain scaling solutions.
- Existing constraints on cosmic string theories from cosmic ray observations may be overstated.
- Further investigation into cosmic string radiation mechanisms is warranted.