Search Publications
Sensitivity to dark sector scales from gravitational wave signatures
Dent, James B.; Dutta, Bhaskar; Ghosh, Sumit +2 more
We consider gravitational sound wave signals produced by a first-order phase transition in a theory with a generic renormalizable thermal effective potential of power law form. We find the frequency and amplitude of the gravitational wave signal can be related in a straightforward manner to the parameters of the thermal effective potential. This l…
Phenomenology of CP-even ALP
Sakurai, Kodai; Yin, Wen
Axion or axion-like particle (ALP) has been usually considered as a CP-odd Nambu-Goldstone boson (NGB) from the spontaneous breakdown of a global U(1) symmetry. In this paper, we point out that the NGB behaves as a CP-even particle coupled to the SM particles in a large class of simple (or perhaps the simplest) renormalizable models. We provide a …
Crosspolar performance of an elliptical corrugated-horn antenna
Silk, Joseph; Wu, Yi-Peng; Pinetti, Elena +1 more
The ultra-slow-roll (USR) inflation represents a class of single-field models with sharp deceleration of the rolling dynamics on small scales, leading to a significantly enhanced power spectrum of the curvature perturbations and primordial black hole (PBH) formation. Such a sharp transition of the inflationary background can trigger the coherent m…
How to search for mirror stars with Gaia
Matzner, Christopher D.; Curtin, David; Howe, Aaron +1 more
We show for the first time how to conduct a direct search for dark matter using Gaia observations. Its public astrometric data may contain the signals of mirror stars, exotic compact objects made of atomic dark matter with a tiny kinetic mixing between the dark and SM photon. Mirror stars capture small amounts of interstellar material in their cor…