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astro-ph.CO2024
Extracting Axion String Network Parameters from Simulated CMB Birefringence Maps using Convolutional Neural Networks
Ray Hagimoto, Andrew J. Long, Mustafa A. Amin
Axion-like particles may form a network of cosmic strings in the Universe today that can rotate the plane of polarization of cosmic microwave background (CMB) photons. Future CMB o…
hep-ph2024
Resonant conversion of axion dark radiation into terahertz electromagnetic radiation in a neutron star magnetosphere
Andrew J. Long, Enrico D. Schiappacasse
In the strong magnetic field of a neutron star's magnetosphere, axions coupled to electromagnetism develop a nonzero probability to convert into photons. Past studies have revealed…
hep-ph2024
Thermal pressure on ultrarelativistic bubbles from a semiclassical formalism
Andrew J. Long, Jessica Turner
We study a planar bubble wall that is traveling at an ultrarelativistic speed through a thermal plasma. This situation may arise during a first-order electroweak phase transition i…