Kari Enqvist and Sami Nurmi JCAP10(2005)013 doi:10.1088/1475-7516/2005/10/013
Non-Gaussianity in curvaton models with nearly quadratic potentials
Kari Enqvist1,2 and Sami Nurmi2
Show affiliationsWe consider curvaton models with potentials that depart slightly from the quadratic form. We show that although such a small departure does not significantly modify the Gaussian part of the curvature perturbation, it can have a pronounced effect on the level of non-Gaussianity. We find that unlike in the quadratic case, the limit of small non-Gaussianity, 
, is quite possible even with small curvaton energy density 
. Furthermore, non-Gaussianity does not imply any strict bounds on r, but the bounds depend on the assumptions about the higher order terms in the curvaton potential.
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E-print Number: astro-ph/0508573
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Issue 10 (October 2005)
Received 6 September 2005, accepted for publication 11 October 2005
Published 25 October 2005
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Non-Gaussianity in curvaton models with nearly quadratic potentials
Kari Enqvist and Sami Nurmi JCAP10(2005)013
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