TY  -  
T1  - Scaling Density of Axion Strings 
SN  -  /  
UR  - http://hdl.handle.net/10138/313457 
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A1  - Hindmarsh, Mark; Lizarraga, Joanes; Lopez-Eiguren, Asier; Urrestilla, Jon 
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PB  -  
Y1  - 2020 
LA  - eng 
AB  - In the QCD axion dark matter scenario with postinflationary Peccei-Quinn symmetry breaking, the number density of axions, and hence the dark matter density, depends on the length of string per unit volume at cosmic time t, by convention written zeta/t(2). The expectation has been that the dimensionless parameter zeta tends to a constant zeta(0), a feature of a string network known as scaling. It has recently been claimed that in larger numerical simulations zeta shows a logarithmic increase with... 
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OP  -  
KW  - DOMAIN-WALLS; EVOLUTION; 114 Physical sciences 
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ER  -