Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interacting Dark Energy in Ho\v{r}ava-Lifshitz Cosmology   In the usual Ho\v{r}ava-Lifshitz cosmological models, the scalar field is
responsible for dark matter. Using an additional scalar field, Saridakis
\cite{sari} has formulated Ho\v{r}ava-Lifshitz cosmology with an effective dark
energy sector. In the paper \cite{sari} the scalar fields do not interact with
each other, here we extend this work to the interacting case, where matter
scalar field $\phi$ interact with dark energy scalar field $\sigma$. We will
show that in contrast with \cite{sari}, where $\sigma$-filed is absent, we can
obtain $w_d ^{\rm eff}<-1$, that is we result to an effective dark energy
presenting phantom behaviour. This behaviour is pure effect of the interaction.

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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: stat
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The categories of this paper are: cs
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin