Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inflation coupled to a Gauss-Bonnet term   The newly released Planck CMB data place tight constraints on slow-roll
inflationary models. Some of commonly discussed inflationary potentials are
disfavored due mainly to the large tensor-to-scalar ratio. In this paper we
show that these potentials may be in good agreement with the Planck data when
the inflaton has a non-minimal coupling to the Gauss-Bonnet term. Moreover,
such a coupling violates the consistency relation between the tensor spectral
index and tensor-to-scalar ratio. If the tensor spectral index is allowed to
vary freely, the Planck constraints on the tensor-to-scalar ratio are slightly
improved.

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The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg