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CMB Bispectrum Induced by the Two Scalars and a Graviton Correlator

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Probing the Early Universe with the CMB Scalar, Vector and Tensor Bispectrum

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Abstract

In this chapter, adapting Eq. (5.5) to the primordial non-Gaussianity in two scalars and a graviton correlation [1], we compute the CMB scalar-scalar-tensor bispectrum. This discussion is based on our paper [2].

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Notes

  1. 1.

    Here, \(\zeta \) and \(\gamma _{ab}\) are equivalent to \({\fancyscript{R}}\) and \(h_{ab}\) in Eq. (2.13), respectively.

  2. 2.

    For \(c_{s *} = 1\), these results are identical to Eqs. (2.30) and (2.31).

  3. 3.

    Equations (3.14) and (3.21) in Ref. [2] include typos.

  4. 4.

    The CMB bispectra generated from the two scalars and a graviton correlator in Figs. 6.2 and 6.3 become slightly smaller than those in Ref. [2] due to the accuracy enhancement of the numerical calculation.

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Authors and Affiliations

  1. Department of Physics and Astrophysics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan

    Maresuke Shiraishi

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  1. Maresuke Shiraishi
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Correspondence to Maresuke Shiraishi .

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Shiraishi, M. (2013). CMB Bispectrum Induced by the Two Scalars and a Graviton Correlator. In: Probing the Early Universe with the CMB Scalar, Vector and Tensor Bispectrum. Springer Theses. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54180-6_6

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