Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tensor to Scalar Ratio in Non-Minimal $\phi^4$ Inflation   We reconsider non-minimal \lambda \phi^4 chaotic inflation which includes the
gravitational coupling term \xi \mathcal{R} \phi^2, where \phi denotes a gauge
singlet inflaton field and \mathcal{R} is the Ricci scalar. For \xi >> 1 we
require, following recent discussions, that the energy scale \lambda^{1/4} m_P
/ \sqrt{\xi} for inflation should not exceed the effective UV cut-off scale m_P
/ \xi, where m_P denotes the reduced Planck scale. The predictions for the
tensor to scalar ratio r and the scalar spectral index n_s are found to lie
within the WMAP 1-\sigma bounds for 10^{-12} < \lambda < 10^{-4} and 10^{-3} <
\xi < 10^2. In contrast, the corresponding predictions of minimal \lambda
\phi^4 chaotic inflation lie outside the WMAP 2-\sigma bounds. We also find
that r > 0.002, provided the scalar spectral index n_s > 0.96. In estimating
the lower bound on r we take into account possible modifications due to quantum
corrections of the tree level inflationary potential.

29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
2
The categories of this paper are: math