[HTML][HTML] Feebly-interacting particles: FIPs 2020 workshop report

P Agrawal, M Bauer, J Beacham, A Berlin… - The European Physical …, 2021 - Springer
With the establishment and maturation of the experimental programs searching for new
physics with sizeable couplings at the LHC, there is an increasing interest in the broader …

Wave dark matter

L Hui - Annual Review of Astronomy and Astrophysics, 2021 - annualreviews.org
We review the physics and phenomenology of wave dark matter: a bosonic dark matter
candidate lighter than about 30 eV. Such particles have a de Broglie wavelength exceeding …

Flat energy spectrum of primordial gravitational waves versus peaks and the NANOGrav 2023 observation

VK Oikonomou - Physical Review D, 2023 - APS
In this work we present several characteristic examples of theories of gravity and particle
physics scenarios that may yield an observable energy spectrum of stochastic primordial …

A next-generation liquid xenon observatory for dark matter and neutrino physics

J Aalbers, SS AbdusSalam, K Abe… - Journal of Physics G …, 2022 - iopscience.iop.org
The nature of dark matter and properties of neutrinos are among the most pressing issues in
contemporary particle physics. The dual-phase xenon time-projection chamber is the …

Unifying inflation with early and late dark energy epochs in axion gravity

VK Oikonomou - Physical Review D, 2021 - APS
We provide a theoretical model of F (R) gravity in which it is possible to describe in a unified
way inflation, an early and a late dark energy era, in the presence of a light axion particle …

Direct search for dark matter axions excluding ALP cogenesis in the 63-to 67-μeV range with the ORGAN experiment

A Quiskamp, BT McAllister, P Altin, EN Ivanov… - Science …, 2022 - science.org
The standard model axion seesaw Higgs portal inflation (SMASH) model is a well-motivated,
self-contained description of particle physics that predicts axion dark matter particles to exist …

Induced gravitational waves with kination era for recent pulsar timing array signals

K Harigaya, K Inomata, T Terada - Physical Review D, 2023 - APS
The evidence of the stochastic gravitational-wave background around the nanohertz
frequency range was recently found by worldwide pulsar timing array (PTA) collaborations …

Dark matter from an even lighter QCD axion: trapped misalignment

L Di Luzio, B Gavela, P Quilez… - Journal of Cosmology …, 2021 - iopscience.iop.org
We show that dark matter can be accounted for by an axion that solves the strong CP
problem, but is much lighter than usual due to a Z Script N symmetry. The whole mass range …

ALP dark matter from kinetic fragmentation: opening up the parameter window

C Eröncel, R Sato, G Servant… - Journal of Cosmology …, 2022 - iopscience.iop.org
The main mechanism responsible for Axion-Like-Particle (ALP) production in the early
universe is the so-called misalignment mechanism. Three regimes have been investigated …

Axion dark matter from first-order phase transition, and very high energy photons from GRB 221009A

S Nakagawa, F Takahashi, M Yamada, W Yin - Physics Letters B, 2023 - Elsevier
We study an axion-like particle (ALP) that experiences a first-order phase transition with
respect to its mass or potential minimum. This can be realized if the ALP obtains a potential …