Axion dark matter and the Lattice
Abstract
First I will review the QCD theta problem and the Peccei-Quinn solution, with its new particle, the axion. I will review the possibility of the axion as dark matter. If PQ symmetry was restored at some point in the hot early Universe, it should be possible to make a definite prediction for the axion mass if it constitutes the Dark Matter. I will describe progress on one issue needed to make this prediction - the dynamics of axionic string-wall networks and how they produce axions. Then I will discuss the sensitivity of the calculation to the high temperature QCD topological susceptibility. My emphasis is on what temperature range is important, and what level of precision is needed.
- Publication:
-
European Physical Journal Web of Conferences
- Pub Date:
- March 2018
- DOI:
- 10.1051/epjconf/201817501009
- arXiv:
- arXiv:1709.09466
- Bibcode:
- 2018EPJWC.17501009M
- Keywords:
-
- High Energy Physics - Phenomenology;
- High Energy Physics - Lattice
- E-Print:
- 18 pages with 9 figures, plenary talk at conference "Lattice 2017" (Granada, Spain)