751 citations · 2.5k across the 29 of their papers we have counts for
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hep-ph2018★ 261 cited
Axions from Strings: the Attractive Solution
Marco Gorghetto, Edward Hardy, Giovanni Villadoro
We study the system of axion strings that forms in the early Universe if the Peccei-Quinn symmetry is restored after inflation. Using numerical simulations, we establish the existe…
hep-ph2018★ 46 cited
Higgs portal dark matter in non-thermal cosmologies
Edward Hardy
A scalar particle with a relic density set by annihilations through a Higgs portal operator is a simple and minimal possibility for dark matter. However, assuming a thermal cosmolo…