Cosmic-string-loop fragmentation

Details Cosmic-string-loop fragmentation Cosmic-string-loop fragmentation

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvd..39..371s&link_type=abstract

Physical Review D (Particles and Fields), Volume 39, Issue 2, 15 January 1989, pp.371-378

Mathematics

Probability

23

Particle-Theory And Field-Theory Models Of The Early Universe, Elementary Particle Processes

Scientific paper

We present the results of a numerical simulation of the fragmentation of single cosmic-string loops in flat spacetime. The analytic solution for the motion of the fragmenting loop is derived, and this solution is followed forward to determine the trajectories of the daughter loops. We find that loop fragmentation is not stochastic; the loop fragmentation probability decreases with fragmentation generation, and a universal loop fragmentation probability is not well defined. All of the loops sampled eventually reached nonintersecting trajectories. We see no evidence for fragmentation down to arbitrarily tiny loops. The final loop size distribution is approximately a lognormal distribution. The mean final loop velocity is v~0.6c.

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