This Voyage 2050 paper highlights the unique science opportunities using spectral
distortions of the cosmic microwave background (CMB). CMB spectral distortions probe …

Axion-like particles (ALPs) decaying into photons are known to affect a wide range of
astrophysical and cosmological observables. In this study we focus on ALPs with masses in …

Following the pioneering observations with COBE in the early 1990s, studies of the cosmic
microwave background (CMB) have focused on temperature and polarization anisotropies …

A bstract The recent detection of the cosmic microwave background polarimeter experiment
BICEP2 of tensor fluctuations in the B-mode power spectrum basically excludes all plausible …

The energy spectrum of the cosmic microwave background (CMB) provides a powerful tool
for constraining standard and non-standard physics in the primordial Universe. Previous …

This paper discusses the science case for a sensitive spectro-polarimetric survey of the
microwave sky. Such a survey would provide a tomographic and dynamic census of the …

We investigate how the resonant conversion at a temperature T̅= 25–65 keV of a fraction of
the CMB photons into an axion-like majoron affects BBN. The scenario, that assumes the …

We propose a singlet majoron model that defines an inverse seesaw mechanism in the ν
sector. The majoron ϕ has a mass m ϕ≈ 0.5 eV and a coupling to the τ lepton similar to the …

A variety of beyond the standard model scenarios contain very light hidden sector U (1)
gauge bosons undergoing kinetic mixing with the photon. The resulting oscillation between …

We discuss the effects on the cosmic microwave background (CMB), cosmic infrared
background (CIB), and thermal Sunyaev-Zeldovich effect due to the peculiar motion of an …