Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Primordial Black Holes from String Inflation   We present a single-field string inflationary model which allows for the
generation of primordial black holes in the low mass region where they can
account for a significant fraction of the dark matter abundance. The potential
is typical of type IIB fibre inflation models and features a plateau at CMB
scales and a near inflection point at large distance scales where the power
spectrum is enhanced due to a period of ultra slow-roll. The tunability of the
underlying parameters is guaranteed by scanning through the string landscape
and their stability against quantum corrections is ensured by an effective
shift symmetry.

2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio