Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic Inflation with Derivative Couplings   We study anisotropic inflationary solutions when the inflaton and its
derivative couple to a vector field. This type of coupling is motivated by
D-brane inflationary models, in which the inflaton, and a vector field living
on the D-brane, couple disformally (derivatively). We start by studying a
phenomenological model where we show the existence of anisotropic solutions and
demonstrate their stability via a dynamical system analysis. Compared to the
case without a derivative coupling, the anisotropy is reduced and thus can be
made consistent with current limits, while the value of the slow-roll parameter
remains almost unchanged. We also discuss solutions for more general cases,
including D-brane like couplings.

17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
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The categories of this paper are: stat
8
The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an