Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hypothesis of photonic portal in the problem of dark matter and
  classical nature of gravitation   Within our model of "photonic portal" to the hypothetical hidden sector of
the Universe, an option is considered, where the massive sterile bosons,
mediating in this sector and described by the antisymmetric-tensor field
A_{\mu\nu} (of dimension one), are gauged by a vector field \chi_\mu (of
dimension zero). When the Einsteinian gravity is switched on into this model,
then it is argued that the metric g_{\mu\nu}(x) of spacetime is proportional to
<\chi_\mu(x) \chi_\nu(x)>_{vac}, being in this way classical in its nature, not
the subject of quantization within an overall quantum theory including
gravitation. A Lagrangian density(generally dependent on \chi_\mu and its first
and second derivatives) is tentatively proposed in such a form, where \chi_\mu
appears also outside of A_{\mu\nu}, spoiling the trivial gauge invariance of
our earlier model with respect to the gauging field \chi_\mu. If the
cosmological constant \lambda is neglected, then the term with \chi_\mu outside
of A_{\mu\nu} vanishes.

36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an