Comment on "More Axions from Strings''
Cosmology and Nongalactic Astrophysics
2021-12-13 v2 High Energy Physics - Phenomenology
Abstract
We comment on a claim that axion strings show a long-term logarithmic increase in the number of Hubble lengths per Hubble volume [arXiv:2007.04990], thereby violating the standard "scaling" expectation of an O(1) constant. We demonstrate that the string density data presented in [arXiv:2007.04990] are consistent with standard scaling, at a string density consistent with that obtained by us [arXiv:1908.03522, arXiv:2102.07723] and other groups. A transient slow growth in Hubble lengths per Hubble volume towards its constant scaling value is explained by standard network modelling [arXiv:2102.07723].
Keywords
Cite
@article{arxiv.2109.09679,
title = {Comment on "More Axions from Strings''},
author = {Mark Hindmarsh and Joanes Lizarraga and Asier Lopez-Eiguren and Jon Urrestilla},
journal= {arXiv preprint arXiv:2109.09679},
year = {2021}
}
Comments
10 pages, 4 figures. Revised version: interpretation error corrected, improved discussion, global fit added