116 citations · 540 across the 21 of their papers we have counts for
4 papers · 1 filter
Audible Axions with a Booster: Stochastic Gravitational Waves from Rotating ALPs
Eric Madge, Wolfram Ratzinger, Daniel Schmitt +1
Gravitational waves provide a novel way to probe axions or axion-like particles coupled to a dark photon field, even in the absence of couplings to Standard Model particles. In the…
Axion Fragmentation on the Lattice
Enrico Morgante, Wolfram Ratzinger, Ryosuke Sato +1
We analyze the phenomenon of axion fragmentation when an axion field rolls over many oscillations of a periodic potential. This is particularly relevant for the case of relaxion, i…
Gravitational Wave Echo of Relaxion Trapping
Abhishek Banerjee, Eric Madge, Gilad Perez +2
To solve the hierarchy problem, the relaxion must remain trapped in the correct minimum, even if the electroweak symmetry is restored after reheating. In this scenario, the relaxio…
Gravitational Waves from an Axion-Dark Photon System: A Lattice Study
Wolfram Ratzinger, Pedro Schwaller, Ben A. Stefanek
In this work, we present a lattice study of an axion - dark photon system in the early Universe and show that the stochastic gravitational wave (GW) background produced by this sys…