Axion dark matter and the Lattice

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...

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Veröffentlicht in:EPJ Web of conferences 2018-01, Vol.175, p.1009
1. Verfasser: Moore, Guy
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/201817501009