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 …

We review the most important models of light dark matter and discuss the NA64 experiment
aimed at searching for hypothetical particles, including dark matter, in the mass range⩽ O …

We discuss the mechanism to produce electron-specific dark matter mediators of spin-0 and
spin-2 in the electron fixed target experiments such as NA64 and LDMX. The secondary …

A vector portal between the Standard Model and the dark sector is a predictive and
compelling framework for thermal dark matter. Through co-annihilations, models of inelastic …

We present a model explaining both the 4.2 σ muon g-2 anomaly and the relic density of
dark matter (DM) in which DM interacts with the Standard Model (SM) via a scalar portal …

The connection between Standard Model (SM) particles and dark matter (DM) can be
introduced via a hidden spin-2 massive mediator. In the present paper we consider the …

The search for new comparably light (well below the electroweak scale) feebly interacting
particles is an exciting possibility to explain some mysterious phenomena in physics, among …

We show that the discrepancy between the observed value of the muon anomalous moment
and the standard model prediction can be explained in the framework of nonlocal theories …

The existence of hidden sectors containing light and feebly-interacting particles offers a
promising avenue to address the shortcomings of the Standard Model (SM). With dynamics …

We propose a model that realizes a semivisible dark photon which can contribute to the
anomalous magnetic moment (g-2) of both electron and muon. In this model, the electron g …