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 …

We review the landscape of QCD axion models. Theoretical constructions that extend the
window for the axion mass and couplings beyond conventional regions are highlighted and …

In the late 1970s, the axion was proposed as a solution to the strong CP problem, ie, the
puzzle why the strong interactions conserve parity P and the product CP of charge …

Axions and other very light axion-like particles appear in many extensions of the Standard
Model, and are leading candidates to compose part or all of the missing matter of the …

Various fundamental-physics experiments such as measurement of the magnetic
birefringence of the vacuum, searches for ultralight dark-matter particles (eg, axions), and …

In these notes I try to introduce the reader to the topic of axions: their theoretical motivation
and expected phenomenology, their role in astrophysics and as dark matter candidate, and …

We present a proposal to search for QCD axions with mass in the 200 μ eV range, assuming
that they make a dominant component of dark matter. Due to the axion–electron spin …

Abstract The Cosmic Axion Spin Precession Experiment (CASPEr) seeks to measure
oscillating torques on nuclear spins caused by axion or axion-like-particle (ALP) dark matter …

A bstract In the presence of axion dark matter, fermion spins experience an “axion wind”
torque and an “axioelectric” force. We investigate new experimental probes of these effects …

We report a new spectroscopic detection scheme for molecular oxygen that achieves
roughly two orders of magnitude higher sensitivity for fully rotationally resolved spectra than …