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 …

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 (SM). We investigate the phenomenology of an …

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 …

The couplings of axion-like particles are probed by different experiments across a huge
range of energy scales. Accordingly, a consistent analysis of the corresponding constraints …

A search for the flavor-changing neutral-current decay B+→ K+ ν ν¯ is performed at the Belle
II experiment at the SuperKEKB asymmetric energy electron-positron collider. The data …

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 …

While the QCD axion is often considered to be necessarily light (≲ eV), recent work has
opened a viable and interesting parameter space for heavy axions, which solve both the …

A bstract We develop an economical theoretical framework for combined explanations of the
flavor physics anomalies involving muons:(g− 2) μ,\({R} _ {K^{\left (\ast\right)}}\), and b→ sμ+ …

A bstract The plethora of increasingly precise experiments which hunt for axion-like particles
(ALPs), as well as their widely different energy reach, call for the theoretical understanding …