Schwinger–Keldysh mechanism in extended quasi-single field inflation
Abstract We study an extension of quasi-single field model of inflation containing multiple semi-heavy isocurvaton fields using the Schwinger–Keldysh mechanism. We calculate the amplitudes and the shapes of the bispectrum and the trispectrum. We show that the diagrammatic approach associated with th...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-019-6969-z |