4 papers
Pre-inflationary QCD axion stars after moduli domination
Edward Hardy, Noelia Sánchez González, Henry Stubbs +1
The growth of adiabatic density perturbations during an era of early matter domination induces fluctuations in pre-inflationary QCD axion dark matter across a broa…
Stellar cooling limits on KK gravitons and dark dimensions
Edward Hardy, Anton Sokolov, Henry Stubbs
We revisit cooling bounds on light Kaluza-Klein (KK) gravitons, as arise in the dark dimension scenario, considering red giants, neutron stars, and supernovae. In addition to brems…
Supernova bounds on new scalars from resonant and soft emission
Edward Hardy, Anton Sokolov, Henry Stubbs
We study supernova cooling constraints on new light scalars that mix with the Higgs, couple only to nucleons, or couple only to leptons. We show that in all these cases scalars wit…
Conformal Dimensions On Causal Random Geometry
Ryan Barouki, Henry Stubbs, John Wheater
We investigate the interaction between matter and causal dynamical triangulations (CDT) in the context of two-dimensional quantum gravity. We focus on the Ising model coupled to CD…