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 …

Axions are well-motivated dark matter candidates with simple cosmological production
mechanisms. They were originally introduced to solve the strong CP problem, but also arise …

A bstract Axions and axion-like particles (ALPs) are well-motivated low-energy relics of high-
energy extensions of the Standard Model (SM). We investigate the phenomenology of an …

Rare meson decays are among the most sensitive probes of both heavy and light new
physics. Among them, new physics searches using kaons benefit from their small total decay …

A bstract Axions and axion-like particles (ALPs) are well-motivated low-energy relics of high-
energy extensions of the Standard Model, which interact with the known particles through …

A bstract The recent results from the Pulsar Timing Array (PTA) collaborations show the first
evidence for the detection of a stochastic background of gravitational waves at the nHz …

A bstract Light pseudoscalars interacting pre-dominantly with Standard Model gauge
bosons (so-called axion-like particles or ALPs) occur frequently in extensions of the …

We study the leading effective interactions between the Standard Model fields and a generic
singlet CP-odd (pseudo-) Goldstone boson. Two possible frameworks for electroweak …

Axion-like particles (ALPs) are pseudo Nambu–Goldstone bosons of spontaneously broken
global symmetries in high-energy extensions of the Standard Model (SM). This makes them …