Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Cosmological Correlations in an Inflating Universe: Can fermion
  and gauge fields loops give a scale free spectrum?   This paper extends the calculation of quantum corrections to the cosmological
correlation $<\zeta\zeta>$, which has been done by Weinberg for a loop of
minimally coupled scalars, to other types of matter loops and a general and
realistic potential. It is shown here that departures from scale invariance are
never large even when Dirac, vector, and conformal scalar fields are present
\emph{during} inflation. No fine tuning is needed, in the sense that effective
masses or coupling constants can have arbitrary values. Even when the mass is
as large as $M_{Pl}$, the one-loop result is still naturally smaller than the
classical one. Thus, the results show that the existence of these fields
\emph{during} inflation may not be ruled out and is consistent with natural
reheating.

17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat