A bstract The Froggatt-Nielsen (FN) mechanism, a prominent framework for explaining the
observed flavor hierarchies, generically predicts the existence of an axion-like particle …

A bstract Non-universal axion models, with the Peccei-Quinn (PQ) symmetry acting on
Standard Model (SM) fermions in a generation-dependent way, are typically accompanied …

Axionlike particles (ALPs) with lepton flavor-violating (LFV) interactions are predicted within
a wide range of flavored ALP models. The proposed μ TRISTAN high-energy e-μ+ and μ+ …

We investigate the ability of μ→ e facilities, Mu2e and COMET, to probe, or discover, new
physics with their detector validation datasets. The validation of the detector response may …

A bstract The particle spectrum of all Majorana neutrino mass models with spontaneous
violation of global lepton number include a Goldstone boson, the so-called majoron. The …

We study a class of supersymmetric models where the strong CP problem is solved through
spontaneous CP violation, carried out by a complex scalar field that determines the Yukawa …

We compute the QCD axion contribution to the energy density of dark radiation,
parameterized by $\Delta N_ {\rm eff} $, by solving Boltzmann equations for the momentum …

We study the possible impact of dark photons on lepton flavor phenomenology. We derive
the constraints on nondiagonal dark photon couplings with leptons by analyzing …

The review discusses the physical program of a new experiment at the Super Charm-Tau
factory, the basis of which will be a powerful electron±positron collider with a luminosity of …

A bstract We provide a comprehensive analysis of the Type-I Seesaw family of neutrino
mass models, including the conventional type-I seesaw and its low-scale variants, namely …