317 citations · 3.1k across the 72 of their papers we have counts for
64 papers · 1 filter
Ultralight Axial Dark Matter
Anson Hook, Junwu Huang, Kevin Zhou
Ultralight dark matter could be an axial vector field, a simple possibility which motivates new experiments. Couplings to fermions, through an axial vector current or a dark electr…
No cosmological constraints on dark photon dark matter from resonant conversion: Impact of nonlinear plasma dynamics
Anson Hook, Junwu Huang, Mohamad Shalaby
We revisit and invalidate all dark photon dark matter constraints from resonant conversion of dark photons into photons (plasmons) in the early universe. These constraints rely on…
Adiabatic Conversion of ALPs into Dark Photon Dark Matter
Edward Broadberry, Saurav Das, Anson Hook +1
We introduce a mechanism by which a misaligned ALP can be dynamically converted into a dark photon in the presence of a background magnetic field. An abundance of non-relativistic…
CMB Spectral Distortions from an Axion-Dark Photon-Photon Interaction
Anson Hook, Gustavo Marques-Tavares, Clayton Ristow
The presence of a plethora of light spin 0 and spin 1 fields is motivated in a number of BSM scenarios, such as the axiverse. The study of the interactions of such light bosonic fi…
Softening the UV without New Particles
Anson Hook, Riccardo Rattazzi
We explore an odd class of QFTs where a hierarchy problem is resolved with new dynamics as opposed to new particles. The essential element of our construction is a pseudo-NG…
Gravitational-wave signatures from reheating
Manuel A. Buen-Abad, Jae Hyeok Chang, Anson Hook
We initiate a study of the gravitational-wave signatures of a phase transition that occurs as the Universe's temperature increases during reheating. The gravitational-wave signatur…
Constraining Vector Dark Matter with Neutrino experiments
Dawid Brzeminski, Saurav Das, Anson Hook +1
Vector Dark Matter (VDM) that couples to lepton flavor (, , ) acts similarly to a chemical potential for the neutrino flavor eigenstates and modifies neutrino oscill…
TF08 Snowmass Report: BSM Model Building
Patrick J. Fox, Graham D. Kribs, Hitoshi Murayama +53
We summarize the state of Beyond the Standard Model (BSM) model building in particle physics for Snowmass 2021, focusing mainly on several whitepaper contributions to BSM model bui…
A Mass for the Dual Photon
Anson Hook, Junwu Huang
We explore a novel IR phase of electromagnetism and place constraints on it. The usual IR modification of electromagnetism, the Higgs phase, involves adding a photon mass for the g…
Searching for a Fifth Force with Atomic and Nuclear Clocks
Dawid Brzeminski, Zackaria Chacko, Abhish Dev +2
We consider the general class of theories in which there is a new ultralight scalar field that mediates an equivalence principle violating, long-range force. In such a framework, t…
Some open questions in axion theory
Prateek Agrawal, Kim V. Berghaus, JiJi Fan +3
This white paper collects some open questions in several different aspects of axion theories. The questions are related to quantization of axion couplings, axion-magnetic monopole…
Precision Early Universe Cosmology from Stochastic Gravitational Waves
Dawid Brzeminski, Anson Hook, Gustavo Marques-Tavares
The causal tail of stochastic gravitational waves can be used to probe the energy density in free streaming relativistic species as well as measure and beta functions…
Early-Universe Model Building
Pouya Asadi, Saurabh Bansal, Asher Berlin +37
Theoretical investigations into the evolution of the early universe are an essential part of particle physics that allow us to identify viable extensions to the Standard Model as w…
Black Hole Production of Monopoles in the Early Universe
Saurav Das, Anson Hook
In the early universe, evaporating black holes heat up the surrounding plasma and create a temperature profile around the black hole that can be more important than the black hole…
Dark Matter from Axion Strings with Adaptive Mesh Refinement
Malte Buschmann, Joshua W. Foster, Anson Hook +4
Axions are hypothetical particles that may explain the observed dark matter (DM) density and the non-observation of a neutron electric dipole moment. An increasing number of axion…
Supernova constraints on an axion-photon-dark photon interaction
Anson Hook, Gustavo Marques-Tavares, Clayton Ristow
We present the supernova constraints on an axion-photon-dark photon coupling, which can be the leading coupling to dark sector models and can also lead to dramatic changes to axion…
Bounds on Gauge Bosons Coupled to Non-conserved Currents
Majid Ekhterachian, Anson Hook, Soubhik Kumar +1
We discuss new bounds on vectors coupled to currents whose non-conservation is due to mass terms, such as . Due to the emission of many final state longitudinally…
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…
Scalars Gliding Through an Expanding Universe
Anson Hook, Gustavo Marques-Tavares, Yuhsin Tsai
In this article we investigate the effects of single derivative mixing in massive bosonic fields. In the regime of large mixing, we show that this leads to striking changes of the…
Ultralight dark matter detection with mechanical quantum sensors
Daniel Carney, Anson Hook, Zhen Liu +2
We consider the use of quantum-limited mechanical force sensors to detect ultralight (sub-meV) dark matter candidates which are weakly coupled to the standard model. We show that m…