Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New mechanism for the generation of primordial seeds for the cosmic
  magnetic fields   We discuss the inflationary production of magnetic seeds for the galactic
dynamo through the photon-graviphoton mixing typical of extended models of
local supersymmetry. An analisys of the allowed region in parameter space shows
that such a mechanism is compatible with existing phenomenological bounds on
the vector mass and on the mixing parameter, but requires a large enough mixing
that seems difficult to implement naturally in the context of a minimal
supersymmetric scenario.

14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con