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 …

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 …

We obtain a reliable cosmological bound on the axion mass ma by (1) deriving the
production rate directly from pion-pion scattering data, which overcomes the breakdown of …

While astrophysical and cosmological probes provide a remarkably precise and consistent
picture of the quantity and general properties of dark matter, its fundamental nature remains …

Ultralight axionlike particles can contribute to the dark matter near the Sun, leading to a
distinct, stochastic signature in terrestrial experiments. We search for such particles through …

The QCD axion is a leading dark matter candidate that emerges as part of the solution to the
strong CP problem in the Standard Model. The coupling of the axion to photons is the most …

Axionlike particles (ALPs) coupled to nucleons might be copiously emitted from a supernova
(SN) core. We extend existing bounds on free-streaming ALPs to the case in which these are …

We propose a model of asymmetric bosonic dark matter (DM) with self-repulsion. By
adopting the two-fluid formalism, we study different DM distribution regimes, either, fully …

A radiative decaying big bang relic with a mass ma≃ 5–25 eV, which we dub “blue axion,”
can be probed with direct and indirect observations of the cosmic optical background (COB) …

The QCD axion offers a natural resolution to the strong-C P problem and provides a
compelling dark matter candidate. If the QCD axion constitutes all the dark matter, the …