Cosmological evolution of cosmic strings with time-dependent tension
High Energy Physics - Phenomenology
2009-11-11 v2 Astrophysics
Abstract
We discuss the cosmological evolution of cosmic strings with time-dependent tension. We show that, in the case that the tension changes as a power of time, the cosmic string network obeys the scaling solution: the characteristic scale of the string network grows with the time. But due to the time dependence of the tension, the ratio of the energy density of infinite strings to that of the background universe is {\it not} necessarily constant.
Keywords
Cite
@article{arxiv.hep-ph/0503227,
title = {Cosmological evolution of cosmic strings with time-dependent tension},
author = {Masahide Yamaguchi},
journal= {arXiv preprint arXiv:hep-ph/0503227},
year = {2009}
}
Comments
9 pages, to appear in Phys. Rev. D