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Title: Axion string dynamics I: 2+1D

Abstract

If the axion exists and if the initial axion field value is uncorrelated at causally disconnected points, then it should be possible to predict the efficiency of cosmological axion production, relating the axionic dark matter density to the axion mass. The main obstacle to making this prediction is correctly treating the axion string cores. We develop a new algorithm for treating the axionic string cores correctly in 2+1 dimensions. When the axionic string cores are given their full physical string tension, axion production is about twice as efficient as in previous simulations. We argue that the string network in 2+1 dimensions should behave very differently than in 3+1 dimensions, so this result cannot be simply carried over to the physical case. We outline how to extend our method to 3+1D axion string dynamics.

Authors:
 [1];  [2]
  1. University of British Columbia, Department of Physics & Astronomy,6224 Agricultural Road, Vancouver BC V6T 1Z1 (Canada)
  2. Institut für Kernphysik, Technische Universität Darmstadt,Schlossgartenstraße 2, D-64289 Darmstadt (Germany)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22572071
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 05; Other Information: PUBLISHER-ID: JCAP05(2016)005; OAI: oai:repo.scoap3.org:15460; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AXIONS; COSMOLOGY; FOUR-DIMENSIONAL CALCULATIONS; MONOPOLES; NONLUMINOUS MATTER; PARTICLE PRODUCTION; REST MASS; STRING THEORY; THREE-DIMENSIONAL CALCULATIONS

Citation Formats

Fleury, Leesa M., and Moore, Guy D. Axion string dynamics I: 2+1D. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/05/005.
Fleury, Leesa M., & Moore, Guy D. Axion string dynamics I: 2+1D. United States. doi:10.1088/1475-7516/2016/05/005.
Fleury, Leesa M., and Moore, Guy D. Tue . "Axion string dynamics I: 2+1D". United States. doi:10.1088/1475-7516/2016/05/005.
@article{osti_22572071,
title = {Axion string dynamics I: 2+1D},
author = {Fleury, Leesa M. and Moore, Guy D.},
abstractNote = {If the axion exists and if the initial axion field value is uncorrelated at causally disconnected points, then it should be possible to predict the efficiency of cosmological axion production, relating the axionic dark matter density to the axion mass. The main obstacle to making this prediction is correctly treating the axion string cores. We develop a new algorithm for treating the axionic string cores correctly in 2+1 dimensions. When the axionic string cores are given their full physical string tension, axion production is about twice as efficient as in previous simulations. We argue that the string network in 2+1 dimensions should behave very differently than in 3+1 dimensions, so this result cannot be simply carried over to the physical case. We outline how to extend our method to 3+1D axion string dynamics.},
doi = {10.1088/1475-7516/2016/05/005},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2016,
place = {United States},
year = {Tue May 03 00:00:00 EDT 2016},
month = {Tue May 03 00:00:00 EDT 2016}
}