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- W3125217169 abstract "Heavy fields of Hubble scale order present during inflation contribute to the non-Gaussian signature for the three-point function of the inflaton. Taking into account that Hubble scale is around the scale of grand unified theory (GUT), this opens a possibility that the GUT scale signatures, which are very hard to be discovered at collider, might be detectable by using information from the precise observations of cosmic microwave background. We discuss a detactability of the $X, Y$ gauge boson present in any GUT in a framework of cosmological collider physics. Calculating one-loop contributions of $X, Y$ gauge bosons to the inflaton three-point functions, we find a remarkable result that one-loop diagram with interactions originated from the mass terms of $X, Y$ gauge bosons provides an enhancement factor expressed by the ratio between the $X, Y$ gauge boson mass and Hubble scale as $(m_X/H)^4$. In an estimation of the non-Gaussianity, this factor is crucial and its impact on the detactability of $X, Y$ gauge bosons is discussed." @default.
- W3125217169 created "2021-02-01" @default.
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- W3125217169 date "2021-01-26" @default.
- W3125217169 modified "2023-09-27" @default.
- W3125217169 title "Non-Gaussianity from $X, Y$ gauge bosons in Cosmological Collider Physics" @default.
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