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Full bispectra from primordial scalar and tensor perturbations in the most general single-field inflation model

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arxiv 1207.0588 v2 pith:UA5JRF33 submitted 2012-07-03 astro-ph.CO gr-qchep-phhep-th

Xian Gao , Tsutomu Kobayashi , Maresuke Shiraishi , Masahide Yamaguchi , Jun'ichi Yokoyama , Shuichiro Yokoyama This is my paper
classification astro-ph.COgr-qchep-phhep-th
keywords bispectrafullinflationgeneralmodelperturbationsprimordialscalar
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We compute the full bispectra, namely both auto- and cross- bispectra, of primordial curvature and tensor perturbations in the most general single-field inflation model whose scalar and gravitational equations of motion are of second order. The formulae in the limits of k-inflation and potential-driven inflation are also given. These expressions are useful for estimating the full bispectra of temperature and polarization anisotropies of the cosmic microwave background radiation.

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  1. Scalar-scalar-tensor interaction in DHOST theories

    gr-qc 2026-06 unverdicted novelty 6.0 of 10

    Derives the cubic scalar-scalar-tensor interaction action for perturbations in quadratic DHOST theories on cosmological backgrounds.

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