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 …

Identifying the nature of dark matter (DM) has long been a pressing question for particle
physics. In the face of ever-more-powerful exclusions and null results from large-exposure …

New Particles Beyond the Standard Model have always been thought to be charged under
at least some of the same gauge interactions of ordinary particles. Although this assumption …

A bstract We assess the status of past and future experiments on lepton flavor violating (LFV)
muon and tau decays into a light, invisible, axion-like particle (ALP), a. We propose a new …

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 …

In the scenario in which QCD axion dark matter is produced after inflation, the Universe is
populated by large inhomogeneities on very small scales. Eventually, these fluctuations will …

Besides CP-preserving interactions, axions and axion-like particles may also have small CP-
violating scalar Yukawa interactions with nucleons and electrons. Any such interaction will …

Single phonon excitations, with energies in the 1–100 meV range, are a powerful probe of
light dark matter (DM). Utilizing effective field theory, we derive a framework to compute DM …

We consider the possibility to detect cosmic light dark matter (DM), ie, axions and dark
photons, of mass∼ 10-6 eV and∼ 10-4 eV, by magnetic excitation in a magnet with strong …

Collective excitations in condensed matter systems, such as phonons and magnons, have
recently been proposed as novel detection channels for light dark matter. We show that …