Regular Article - Theoretical Physics
CMB imprints of non-canonical anisotropic inflation
Phenikaa Institute for Advanced Study, Phenikaa University, 12116, Hanoi, Vietnam
2 Faculty of Basic Sciences, Phenikaa University, 12116, Hanoi, Vietnam
3 Faculty of Physics, VNU University of Science, Vietnam National University, 11416, Hanoi, Vietnam
4 Institute of Physics, National Chiao Tung University, 30010, Hsin Chu, Taiwan
Accepted: 26 April 2021
Published online: 5 May 2021
Effect of non-canonical scalar fields on the CMB imprints of the anisotropic inflation will be discussed in details in this paper. In particular, we are able to obtain the general formalism of the angular power spectra in the scalar perturbations, tensor perturbations, cross-correlations, and linear polarization in the context of the anisotropic inflation model involving non-canonical scalar fields. Furthermore, some significant numerical spectra will be plotted using the most recent data of Planck as well as the BICEP2 and Keck array. As a result, we find a very interesting point that the TT spectra induced by the tensor perturbations as well as by the linear polarization will increase when the speed of sound decreases.
© The Author(s) 2021
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