Abstract The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good
description of a wide range of astrophysical and cosmological data. However, there are a …

Abstract LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation
from cosmic background Radiation Detection, is a space mission for primordial cosmology …

We present results from an analysis of all data taken by the BICEP2, Keck Array, and
BICEP3 CMB polarization experiments up to and including the 2018 observing season. We …

The observed pattern of linear polarization of the cosmic microwave background photons is
a sensitive probe of physics violating parity symmetry under inversion of spatial coordinates …

The current cosmological model requires new physics beyond the standard model of
elementary particles and fields, such as dark matter and dark energy. Their nature is …

Polarization of the cosmic microwave background (CMB) is sensitive to new physics
violating parity symmetry, such as the presence of a pseudoscalar “axionlike” field. Such a …

Recently, it has been found that complete resolution of the Hubble tension might point to a
scale-invariant Harrison-Zeldovich spectrum of primordial scalar perturbation, ie, ns= 1 for H …

Motivated by the discrepancy between Bayesian and frequentist upper limits on the tensor-to-
scalar ratio parameter r found by the SPIDER collaboration, we investigate whether a similar …

A pseudoscalar “axionlike” field, ϕ, may explain the 3 σ hint of cosmic birefringence
observed in the EB power spectrum of the cosmic microwave background polarization data …

Since the discovery of the accelerated expansion of the present universe, significant
theoretical developments have been made in the area of modified gravity. In the meantime …