Non-Gaussianity beyond slow roll in multi-field inflation

Byrnes C, Tasinato G (2009)
JCAP 2009(08): 016.

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We study the non-Gaussianity generated during multiple-field inflation. Weprovide an exact expression for the bispectrum parameter f_NL which is validbeyond the slow-roll regime, valid for certain classes of inflationary models.We then study a new, exact multi-field inflationary model considering a casewhere the bispectrum grows to observable values at the end of inflation. Weshow that in this case the trispectrum is also large and may even provide thedominant signal of non-Gaussianity.
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Byrnes C, Tasinato G. Non-Gaussianity beyond slow roll in multi-field inflation. JCAP. 2009;2009(08):016.
Byrnes, C., & Tasinato, G. (2009). Non-Gaussianity beyond slow roll in multi-field inflation. JCAP, 2009(08), 016. doi:10.1088/1475-7516/2009/08/016
Byrnes, C., and Tasinato, G. (2009). Non-Gaussianity beyond slow roll in multi-field inflation. JCAP 2009, 016.
Byrnes, C., & Tasinato, G., 2009. Non-Gaussianity beyond slow roll in multi-field inflation. JCAP, 2009(08), p 016.
C. Byrnes and G. Tasinato, “Non-Gaussianity beyond slow roll in multi-field inflation”, JCAP, vol. 2009, 2009, pp. 016.
Byrnes, C., Tasinato, G.: Non-Gaussianity beyond slow roll in multi-field inflation. JCAP. 2009, 016 (2009).
Byrnes, Christian, and Tasinato, Gianmassimo. “Non-Gaussianity beyond slow roll in multi-field inflation”. JCAP 2009.08 (2009): 016.
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