Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mixed non-Gaussianity in multiple-DBI inflation   We study a model of multiple-field DBI inflation leading to mixed form of
primordial non-Gaussianity, including equilateral and local bispectrum shapes.
We present a general formalism based on the Hamilton-Jacobi approach, allowing
us to go beyond slow-roll, combining the three-point function for the fields at
Hubble-exit with the non-linear evolution of super-Hubble scales. We are able
to obtain analytic results by taking a separable Ansatz for the Hubble rate. We
find general expressions for both the equilateral and local type
non-Gaussianity parameter fNL. The equilateral non-Gaussianity includes the
usual enhancement for small sound speeds, but multiplied by an analytic factor
which can lead to a suppression. We illustrate our results with two scenarios.
In the first model, previously found to have detectable local non-Gaussianity,
we find that the equilateral signal is not sufficiently suppressed to evade
current observational bounds. In our second scenario we construct a model which
exhibits both a detectable equilateral fNL and a negative local fNL.

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The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph