A potential source for parity violation in the Universe is inflation. The simplest inflationary
models have two fields: the inflaton and graviton, and the lowest-order parity-violating …

It was recently shown that domain walls from the spontaneous breaking of CP symmetry are
exactly stable, and must be inflated away to recover a viable cosmology. We investigate the …

The search for primordial B-mode polarization of the cosmic microwave background (CMB)
is limited by the sample variance of B-modes produced at later times by gravitational …

We explore a feasible model that combines near-inflection point small-field slow roll
inflationary scenario driven by single scalar inflaton with the production of non-thermal …

Production of gravitationally coupled light moduli fields must be suppressed in the early
universe so that its decay products do not alter Big Bang Nucleosynthesis (BBN) predictions …

We revisit a class of simple single-field inflation models and demonstrate that they can
readily produce a negligible tensor/scalar ratio r. Motivated by recent work suggesting the …

The polarized Sunyaev-Zel'dovich (pSZ) effect is sourced by the Thomson scattering of
cosmic microwave background (CMB) photons from distant free electrons and yields a novel …

The existence of a cosmic background of primordial gravitational waves (PGWB) is a robust
prediction of inflationary cosmology, but it has so far evaded discovery. The most promising …

We consider a new physics model, where the Standard Model (SM) is extended by
hyperchargeless Y= 0 triplet fermions and a Higgs triplet with hypercharge Y= 2. The first two …

CMB-S4 is a ground-based experiment that will use large-format bolometer arrays to map
Cosmic Microwave Background (CMB) polarization with unprecedented sensitivity, including …