Particle physics today faces the challenge of explaining the mystery of dark matter, the origin
of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent …

A bstract In recent years, several pulsar timing array collaborations have reported first hints
for a stochastic gravitational wave background at nano-Hertz frequencies. Here we …

The symmetry breaking of grand unified gauge groups in the early Universe often leaves
behind relic topological defects such as cosmic strings, domain walls, or monopoles. For …

We derive model-independent quantization conditions on the axion couplings (sometimes
known as the anomaly coefficients) to the standard model gauge group [SU (3)× SU (2)× U …

Searches for dark matter decaying into photons constrain its lifetime to be many orders of
magnitude larger than the age of the Universe. A corollary statement is that the abundance …

Models that produce axionlike particles (ALPs) after cosmological inflation due to
spontaneous U (1) symmetry breaking also produce cosmic-string networks. Those axionic …

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 …

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 …

The recent observations by pulsar timing array (PTA) experiments suggest the existence of
stochastic gravitational wave background in the nano-Hz range. It can be a hint for the new …

We summarize the recent progress of the Axion Longitudinal Plasma Haloscope (ALPHA)
Consortium, a new experimental collaboration to build a plasma haloscope to search for …