Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CMB bounds on tensor-scalar-scalar inflationary correlations   The nonlinear interaction between one graviton and two scalars is enhanced in
specific inflationary models, potentially leading to distinguishable signatures
in the bispectrum of the cosmic microwave background (CMB) anisotropies. We
develop the tools to examine such bispectrum signatures, and show a first
application using WMAP temperature data. We consider several $\ell$-ranges,
estimating the $g_{tss}$ amplitude parameter, by means of the so-called
separable modal methodology. We do not find any evidence of a
tensor-scalar-scalar signal at any scale. Our tightest bound on the size of the
tensor-scalar-scalar correlator is derived from our measurement including all
the multipoles in the range $ 2 \leq \ell \leq 500$ and it reads $g_{tss} = -48
\pm 28$ ($68\%$CL). This is the first direct observational constraint on the
primordial tensor-scalar-scalar correlation, and it will be cross-checked and
improved by applying the same pipeline to high-resolution temperature and
polarization data from $Planck$ and forthcoming CMB experiments.

32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an