215 citations · 552 across the 23 of their papers we have counts for
5 papers · 2 filters
A Time-Varying Fine Structure Constant from Naturally Ultralight Dark Matter
Dawid Brzeminski, Zackaria Chacko, Abhish Dev +1
We present a class of models in which the coupling of the photon to an ultralight scalar field that has a time-dependent vacuum expectation value causes the fine structure constant…
Axion string signatures II: A cosmological plasma collider
Prateek Agrawal, Anson Hook, Junwu Huang +1
We study early and late time signatures of both QCD axion strings and hyperlight axion strings (axiverse strings). We focus on charge deposition onto axion strings from electromagn…
Causal gravitational waves as a probe of free streaming particles and the expansion of the Universe
Anson Hook, Gustavo Marques-Tavares, Davide Racco
The low frequency part of the gravitational wave spectrum generated by local physics, such as a phase transition or parametric resonance, is largely fixed by causality, offering a…
Non-linearly realized discrete symmetries
Saurav Das, Anson Hook
While non-linear realizations of continuous symmetries feature derivative interactions and have no potential, non-linear realizations of discrete symmetries feature non-derivative…
Searching for Millicharged Particles with Superconducting Radio-Frequency Cavities
Asher Berlin, Anson Hook
We demonstrate that superconducting radio-frequency cavities can be used to create and detect millicharged particles and are capable of extending the reach to couplings several ord…