A Note on the Finiteness of Curvature at Cosmic String Cusps
High Energy Physics - Phenomenology
2007-05-23 v1 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We examine a Nambu-Goto string trajectory in the neighbourhood of a cusp and determine the extrinsic curvature invariants. These are demonstrated to be finite, in contradiction with naive expectation. Thus the Nambu action is a valid approximation for the motion of a cosmic string vortex even at cusps. This suggests that cusp annihilation is not a feasible mechanism for particle radiation from cosmic strings.
Cite
@article{arxiv.hep-ph/9412232,
title = {A Note on the Finiteness of Curvature at Cosmic String Cusps},
author = {Ruth Gregory},
journal= {arXiv preprint arXiv:hep-ph/9412232},
year = {2007}
}
Comments
7 pages, plain TeX