155 citations · 1.3k across the 30 of their papers we have counts for
21 papers · 1 filter
Detection of Bosenovae with Quantum Sensors on Earth and in Space
Jason Arakawa, Joshua Eby, Marianna S. Safronova +2
In a broad class of theories, the accumulation of ultralight dark matter (ULDM) with particles of mass leads the to formation of long-l…
A Generic Formation Mechanism of Ultralight Dark Matter Solar Halos
Dmitry Budker, Joshua Eby, Marco Gorghetto +2
As-yet undiscovered light bosons may constitute all or part of the dark matter (DM) of our Universe, and are expected to have (weak) self-interactions. We show that the quartic sel…
What can a GNOME do? Search targets for the Global Network of Optical Magnetometers for Exotic physics searches
S. Afach, D. Aybas Tumturk, H. Bekker +50
Numerous observations suggest that there exist undiscovered beyond-the-Standard-Model particles and fields. Because of their unknown nature, these exotic particles and fields could…
New Constraints on Dark Matter and Cosmic Neutrino Profiles through Gravity
Yu-Dai Tsai, Joshua Eby, Jason Arakawa +2
We derive purely gravitational constraints on dark matter and cosmic neutrino profiles in the solar system using asteroid (101955) Bennu. We focus on Bennu because of its extensive…
From axion quality and naturalness problems to a high-quality QCD relaxion
Abhishek Banerjee, Joshua Eby, Gilad Perez
We highlight general issues associated with quality and naturalness problems in theories of light QCD-axions, axion-like particles, and relaxions. We show the presence of Planck-su…
SpaceQ -- Direct Detection of Ultralight Dark Matter with Space Quantum Sensors
Yu-Dai Tsai, Joshua Eby, Marianna S. Safronova
Recent advances in quantum sensors, including atomic clocks, enable searches for a broad range of dark matter candidates. The question of the dark matter distribution in the Solar…
Probing Relativistic Axions from Transient Astrophysical Sources
Joshua Eby, Satoshi Shirai, Yevgeny V. Stadnik +1
Emission of relativistic axions from transient sources, such as axion star explosions, can lead to observable signatures. We show that axion bursts from collapsing axion stars can…
Global View of Axion Stars with (Nearly) Planck-Scale Decay Constants
Joshua Eby, Lauren Street, Peter Suranyi +1
We show that axion stars formed from axions with nearly Planck-scale decay constants are unstable to decay, and are unlikely to have phenomenological consequences. More general…
Galactic Condensates composed of Multiple Axion Species
Joshua Eby, Madelyn Leembruggen, Lauren Street +2
Ultralight scalar dark matter has been proposed to constitute a component of dark matter, though the minimal scenarios have increasingly become constrained. In this work, we analyz…
Searching for Earth/Solar Axion Halos
Abhishek Banerjee, Dmitry Budker, Joshua Eby +4
We discuss the sensitivity of the present and near-future axion dark matter experiments to a halo of axions or axion-like particles gravitationally bound to the Earth or the Sun. T…
Global view of QCD axion stars
Joshua Eby, Madelyn Leembruggen, Lauren Street +2
Taking a comprehensive view, including a full range of boundary conditions, we reexamine QCD axion star solutions based on the relativistic Klein-Gordon equation (using the Ruffini…
Luminous Signals of Inelastic Dark Matter in Large Detectors
Joshua Eby, Patrick J. Fox, Roni Harnik +1
We study luminous dark matter signals in models with inelastic scattering. Dark matter that scatters inelastically off elements in the Earth is kicked into an excited state $…
Relaxion Stars and their detection via Atomic Physics
Abhishek Banerjee, Dmitry Budker, Joshua Eby +2
The cosmological relaxion can address the hierarchy problem, while its coherent oscillations can constitute dark matter in the present universe. We consider the possibility that th…
On Approximation Methods in the Study of Boson Stars
Joshua Eby, Madelyn Leembruggen, Lauren Street +2
We analyze the accuracy of the variational method in computing physical quantities relevant for gravitationally bound Bose-Einstein condensates. Using a variety of variational ansä…
Classical Nonrelativistic Effective Field Theory and the Role of Gravitational Interactions
Joshua Eby, Kyohei Mukaida, Masahiro Takimoto +2
Coherent oscillation of axions or axion-like particles may give rise to long-lived clumps, called axion stars, because of the attractive gravitational force or its self-interaction…
Expansion in Higher Harmonics of Boson Stars using a Generalized Ruffini-Bonazzola Approach, Part 1: Bound States
Joshua Eby, Peter Suranyi, L. C. R. Wijewardhana
The method pioneered by Ruffini and Bonazzola (RB) to describe boson stars involves an expansion of the boson field which is linear in creation and annihilation operators. In the n…
Decay of Ultralight Axion Condensates
Joshua Eby, Michael Ma, Peter Suranyi +1
Axion particles can form macroscopic condensates, whose size can be galactic in scale for models with very small axion masses eV, and which are sometimes referred t…
QCD Axion Star Collapse with the Chiral Potential
Joshua Eby, Madelyn Leembruggen, Peter Suranyi +1
In a previous work, we analyzed collapsing axion stars using the low-energy instanton potential, showing that the total energy is always bounded and that collapsing axion stars do…
Collider Signatures of Flavorful Higgs Bosons
Wolfgang Altmannshofer, Joshua Eby, Stefania Gori +3
Motivated by our limited knowledge of the Higgs couplings to first two generation fermions, we analyze the collider phenomenology of a class of two Higgs doublet models (2HDMs) wit…
Boson Stars from Self-Interacting Dark Matter
Joshua Eby, Chris Kouvaris, Niklas Grønlund Nielsen +1
We study the possibility that self-interacting bosonic dark matter forms star-like objects. We study both the case of attractive and repulsive self-interactions, and we focus parti…
The Lifetime of Axion Stars
Joshua Eby, Peter Suranyi, L. C. R. Wijewardhana
We investigate the decay of condensates of scalars in a field theory defined by , where and are the mass and decay const…