Peter Adshead

TL;DR: The CMB-S4 project as mentioned in this paper is a ground-based cosmic microwave background (CMB) experiment with superconducting cameras, which will be used for the search for the B-mode polarization signature of primordial gravitational waves and the determination of the number and masses of neutrinos.

TL;DR: The CMB-S4 project as discussed by the authors is a ground-based cosmic microwave background (CMB) experiment with superconducting cameras, which will be used for the search for the B-mode polarization signature of primordial gravitational waves and the determination of the number and masses of neutrinos.

TL;DR: Abazajian et al. as discussed by the authors developed a forecasting framework that includes a power-spectrum-based semi-analytic projection tool, targeted explicitly towards optimizing constraints on the tensor-to-scalar ratio, in the presence of Galactic foregrounds and gravitational lensing of the CMB.

TL;DR: In this paper, the authors studied the effect of preheating into Abelian gauge fields on the amount of relativistic degrees of freedom in the early universe, and showed that the efficiency of the preheated field is correlated with the tensor-to-scalar ratio.

TL;DR: In this paper, it was shown that the tensor-to-scalar ratio of the inflaton's possible axial coupling to Abelian gauge fields is correlated with the number of relativistic degrees of freedom.