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Parity Violation of Gravitons in the CMB Bispectrum
Maresuke Shiraishi, Daisuke Nitta, Shuichiro Yokoyama
We investigate the cosmic microwave background (CMB) bispectra of the intensity (temperature) and polarization modes induced by the graviton non-Gaussianities, which arise from the…
Violation of the Rotational Invariance in the CMB Bispectrum
Maresuke Shiraishi, Shuichiro Yokoyama
We investigate a statistical anisotropy on the Cosmic Microwave Background (CMB) bispectrum, which can be generated from the primordial non-Gaussianity induced by quantum fluctuati…
Cosmic microwave background bispectrum of tensor passive modes induced from primordial magnetic fields
Maresuke Shiraishi, Daisuke Nitta, Shuichiro Yokoyama +2
If the seed magnetic fields exist in the early Universe, tensor components of their anisotropic stresses are not compensated prior to neutrino decoupling and the tensor metric pert…
Computation approach for CMB bispectrum from primordial magnetic fields
Maresuke Shiraishi, Daisuke Nitta, Shuichiro Yokoyama +2
We present a detailed calculation of our previous short paper [M. Shiraishi, D. Nitta, S. Yokoyama, K. Ichiki, and K. Takahashi, Phys. Rev. D 82, 121302 (2010).] in which we have i…