Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reconstruction of the primordial power spectrum from CMB data   Measuring the deviation from scale invariance of the primordial power
spectrum is a critical test of inflation. In this paper we reconstruct the
shape of the primordial power spectrum of curvature perturbations from the
cosmic microwave background data, including the 7-year Wilkinson Microwave
Anisotropy Probe data and the Atacama Cosmology Telescope 148 GHz data, by
using a binning method of a cubic spline interpolation in log-log space. We
find that the power-law spectrum is preferred by the data and that the
Harrison-Zel'dovich spectrum is disfavored at 95% confidence level. These
conclusions hold with and without allowing for tensor modes, however the
simpler model without tensors is preferred by the data. We do not find evidence
for a feature in the primordial power spectrum - in full agreement with generic
predictions from cosmological inflation.

25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org