Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inflationary Parameters in Renormalization Group Improved $\phi^4$
  Theory   Inflation models can be examined by the cosmological observations, WMAP,
Planck, BICEP2 and so on. These observations directly constrain the spectral
index, $n_s$, and the tensor-to-scalar ratio, $r$. Besides, from a theoretical
point of view, it has been shown that any inflation models asymptote a
universal attractor in $(n_s,r)$ plane for a larger scalar-gravity coupling. In
this work we consider a simple chaotic inflation model with a scalar quartic
and a scalar-curvature interactions. The quantum corrections are introduced for
these interactions through the renormalization group. The inflationary
parameters, $n_s$ and $r$, are numerically calculated with shifting the bare
scalar-gravity coupling $\xi_0$, the quartic scalar bare coupling $\lambda_0$,
the renormalization scale $\mu$ and the e-folding number $N$. The Planck data
is consistent with the $\phi^4$ theory with a finite scalar-curvature coupling.
It is found that the RG running induces a non-universal contribution for $n_s$
and $r$. It can increase the tensor-to-scalar ratio, $r$, which is consistent
with Planck data so that it may approach the BICEP2 data for a small
renormalization scale.

20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs