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- W3103165936 abstract "If time-translations are spontaneously broken, so are boosts. This symmetry breaking pattern can be non-linearly realized by either just the Goldstone boson of time translations, or by four Goldstone bosons associated with time translations and boosts. In this paper we extend the Effective Field Theory of Multifield Inflation to consider the case in which the additional Goldstone bosons associated with boosts are light and coupled to the Goldstone boson of time translations. The symmetry breaking pattern forces a coupling to curvature so that the mass of the additional Goldstone bosons is predicted to be equal to √2H in the vast majority of the parameter space where they are light. This pattern therefore offers a natural way of generating self-interacting particles with Hubble mass during inflation. After constructing the general effective Lagrangian, we study how these particles mix and interact with the curvature fluctuations, generating potentially detectable non-Gaussian signals." @default.
- W3103165936 created "2020-11-23" @default.
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- W3103165936 date "2017-02-17" @default.
- W3103165936 modified "2023-10-16" @default.
- W3103165936 title "Boost breaking in the EFT of inflation" @default.
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- W3103165936 doi "https://doi.org/10.1088/1475-7516/2017/02/034" @default.
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