We investigate the possibility of constraining statistical anisotropies of the primordial tensor perturbations by using future observations of the cosmic microwave background (CMB) B-mode polarization. By parametrizing a statistically anisotropic tensor power spectrum as Ph(k)=Ph(k)ngncosnθk, where θk is an angle of the direction of k^=k/k from a preferred direction, we find that it is possible for future B-mode observations such as CMB-S4 to detect the tensor statistical anisotropy at the level of gn∼O(0.1).
|Journal||Physical Review D|
|Publication status||Published - 2018 Oct 15|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)