Cosmic string loops: Large and small, but not tiny

Journal Article · Sat Mar 15 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.063532· OSTI ID:21249816

Vanchurin, Vitaly ^[1]

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1. Arnold-Sommerfeld-Center for Theoretical Physics, Department fuer Physik, Ludwig-Maximilians-Universitaet Muenchen, Theresienstrasse 37, D-80333, Munich (Germany)

We develop an analytical model to study the production spectrum of loops in the cosmic string network. In the scaling regime, we find two different scales corresponding to large (one order below horizon) and small (few orders below horizon) loops. The very small (tiny) loops at the gravitational backreaction scale are absent, and thus, our model has no ultraviolet divergences. We calculate the spectrum of loops and derive analytical expressions for the positions and magnitudes of the small and large scale peaks. The small loops are produced by large bursts of similar loops moving with very high velocities in the same direction. We describe the shape of the large loops, which would usually consist of few kinks and few cusps per oscillation cycle. We also argue that the typical size of large loops is set by the correlation length, which does not depend on the intercommutation probability p, while the interstring distance scales as p{sup 1/3}.

• OSTI ID: 21249816
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 6 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRELATIONS
COSMOLOGICAL MODELS
CUSPED GEOMETRIES
OSCILLATIONS
PROBABILITY
SCALING
SIMULATION
SPECTRA
STRING MODELS
ULTRAVIOLET DIVERGENCES
VELOCITY