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 dark photon is a massive hypothetical particle that interacts with the Standard Model by
kinetically mixing with the visible photon. For small values of the mixing parameter, dark …

The last decade has seen unprecedented effort in dark matter model building at all mass
scales coupled with the design of numerous new detection strategies. Transformative …

The recent observations by pulsar timing array (PTA) experiments suggest the existence of
stochastic gravitational wave background in the nano-Hz range. It can be a hint for the new …

Ultralight axions and dark photons are well-motivated dark matter candidates. Inside the
plasma, once the mass of ultralight dark matter candidates equals the plasma frequency …

A bstract Motivated by the recent XENON1T results, we explore various new physics models
that can be discovered through searches for electron recoils in\(\mathcal {O}\)(keV) …

A bstract Starting with the de Broglie-Proca Lagrangian for a massive vector field, we
calculate the number density of particles resulting from gravitational particle production …

Any new vector boson with non-zero mass (a'dark photon'or'Proca boson') that is present
during inflation is automatically produced at this time from vacuum fluctuations and can …

It has been shown that the longitudinal mode of a massive vector boson can be produced by
inflationary fluctuations and account for the dark matter content of the Universe. In this work …

We point out two ways to search for low-mass axion dark matter using cosmic microwave
background (CMB) polarization measurements. These appear, in particular, to be some of …