Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-Gaussianity of a single scalar field in general covariant
  Ho\v{r}ava-Lifshitz gravity   In this paper, we study non-Gaussianity generated by a single scalar field in
slow-roll inflation in the framework of the non-relativistic general covariant
Ho\v{r}ava-Lifshitz theory of gravity with the projectability condition and an
arbitrary coupling constant $\lambda$, where $\lambda$ characterizes the
deviation of the theory from general relativity (GR) in the infrared. We find
that the leading effect of self-interaction, in contrary to the case of minimal
scenario of GR, is in general of the order $\hat{\alpha}_{n} \epsilon^{3/2}$,
where $\epsilon$ is a slow-roll parameter, and $\hat{\alpha}_{n} (n = 3, 5)$
are the dimensionless coupling coefficients of the six-order operators of the
Lifshitz scalar, and have no contributions to power spectra and indices of both
scalar and tensor. The bispectrum, comparing with the standard one given in GR,
is enhanced, and gives rise to a large value of the nonlinearity parameter
$f_{\text{NL}}$.We study how the modified dispersion relation with high order
moment terms affects the evaluation of the mode function and in turn the
bispectrum, and show explicitly that the mode function takes various asymptotic
forms during different periods of its evolution. In particular, we find that it
is in general of superpositions of oscillatory functions, instead of plane
waves like in the minimal scenario of GR. This results in a large enhancement
of the folded shape in the bispectrum.

14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat