TY  - BOOK
AU  - Shiraishi,Maresuke
ED  - SpringerLink (Online service)
TI  - Probing the Early Universe with the CMB Scalar, Vector and Tensor Bispectrum
T2  - Springer Theses, Recognizing Outstanding Ph.D. Research,
SN  - 9784431541806
AV  - QB1-991 
U1  - 520 23
PY  - 2013///
CY  - Tokyo
PB  - Springer Japan, Imprint: Springer
KW  - Physics
KW  - Mathematical physics
KW  - Astronomy
KW  - Astrophysics
KW  - Cosmology
KW  - Astronomy, Astrophysics and Cosmology
KW  - Mathematical Methods in Physics
KW  - Mathematical Physics
N1  - Introduction -- Fluctuations in the inflation -- Fluctuations in cosmic microwave background radiation -- Primordial non-Gaussianities -- General formalism for the CMB bispectrum from primordial scalar, vector and tensor non-Gaussianities -- CMB bispectrum Induced by the two scalars and a graviton correlator -- Violation of the rotational invariance in the CMB bispectrum -- Parity violation of gravitons in the CMB bispectrum -- CMB bispectrum generated from primordial magnetic fields -- Conclusion
N2  - The non-Gaussianity in the primordial density fluctuations is a key feature to clarify the early Universe and it has been probed with the Cosmic Microwave Background (CMB) bispectrum. In recent years, we have treated the novel-type CMB bispectra, which originate from the vector- and tensor-mode perturbations and include the violation of the rotational or parity invariance. On the basis of our current works, this thesis provides the general formalism for the CMB bispectrum sourced by the non-Gaussianity in the scalar, vector and tensor-mode perturbations. Applying this formalism, we calculate the CMB bispectra from the two scalars and a graviton correlation and primordial magnetic fields, and then outline new constraints on these magnitudes. Furthermore, this formalism can be easily extended to the cases where the rotational or parity invariance is broken. We also compute the CMB bispectra from the scalar-mode non-Gaussianities with a preferred direction and the tensor-mode non-Gaussianities induced by the parity-violating Weyl cubic terms. Here, we show that these bispectra include unique signals, which any symmetry-invariant models can never produce
UR  - http://dx.doi.org/10.1007/978-4-431-54180-6
ER  -