Speaker
Description
The QCD axion represents a well-motivated new physics candidate capable of explaining dark matter and the absence of the neutron electric dipole moment. If realized after the breaking of a Peccei-Quinn symmetry after the end of inflation, the late-time number density of axions is jointly determined by radiation of axions from topological defects known as strings and from the dynamics of the axion field as it acquires a mass through the QCD phase transition. Here I present the results of simulations of axion radiation from strings using the block-structured adaptive mesh refinement code AMReX, which greatly extends the dynamical range of conventional simulation techniques, towards a precise determination of the mass of the QCD axion which produces the observed relic abundance of dark matter.
| Are you are a member of the APS Division of Particles and Fields? | Yes |
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