The NANOGrav 15 yr data set: Search for signals from new physics

A Afzal, G Agazie, A Anumarlapudi… - The Astrophysical …, 2023‏ - iopscience.iop.org
The 15 yr pulsar timing data set collected by the North American Nanohertz Observatory for
Gravitational Waves (NANOGrav) shows positive evidence for the presence of a low …

Second data release from the European Pulsar Timing Array: Challenging the ultralight dark matter paradigm

C Smarra, B Goncharov, E Barausse, J Antoniadis… - Physical Review Letters, 2023‏ - APS
Pulsar Timing Array experiments probe the presence of possible scalar or pseudoscalar
ultralight dark matter particles through decade-long timing of an ensemble of galactic …

Frequency ratio measurements at 18-digit accuracy using an optical clock network

Nature, 2021‏ - nature.com
Atomic clocks are vital in a wide array of technologies and experiments, including tests of
fundamental physics. Clocks operating at optical frequencies have now demonstrated …

Improved limits on the coupling of ultralight bosonic dark matter to photons from optical atomic clock comparisons

M Filzinger, S Dörscher, R Lange, J Klose, M Steinel… - Physical Review Letters, 2023‏ - APS
We present improved constraints on the coupling of ultralight bosonic dark matter to photons
based on long-term measurements of two optical frequency ratios. In these optical clock …

AION: an atom interferometer observatory and network

L Badurina, E Bentine, D Blas, K Bongs… - … of Cosmology and …, 2020‏ - iopscience.iop.org
We outline the experimental concept and key scientific capabilities of AION (Atom
Interferometer Observatory and Network), a proposed experimental programme using cold …

Search for ultralight dark matter from long-term frequency comparisons of optical and microwave atomic clocks

T Kobayashi, A Takamizawa, D Akamatsu, A Kawasaki… - Physical review …, 2022‏ - APS
We search for ultralight scalar dark matter candidates that induce oscillations of the fine
structure constant, the electron and quark masses, and the quantum chromodynamics …

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… - Annalen der …, 2024‏ - Wiley Online Library
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 …

Cosmology of axion dark matter

CAJ O'Hare - arxiv preprint arxiv:2403.17697, 2024‏ - arxiv.org
I present an introduction and topical review on axions as a dark matter candidate. Emphasis
is placed on issues surrounding the cosmology of axion dark matter that are relevant for …

New horizons: Scalar and vector ultralight dark matter

D Antypas, A Banerjee, C Bartram… - arxiv preprint arxiv …, 2022‏ - arxiv.org
The last decade has seen unprecedented effort in dark matter model building at all mass
scales coupled with the design of numerous new detection strategies. Transformative …

A generic formation mechanism of ultralight dark matter solar halos

D Budker, J Eby, M Gorghetto, M Jiang… - Journal of Cosmology …, 2023‏ - iopscience.iop.org
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 self …