Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superheavy Dark Matter in Light of Dark Radiation   Superheavy dark matter can satisfy the observed dark matter abundance if the
stability condition is fulfilled. Here, we propose a new Abelian gauge symmetry
${\rm U(1)}_H$ for the stability of superheavy dark matter as the
electromagnetic gauge symmetry to the electron. The new gauge boson associated
with ${\rm U(1)}_H$ contributes to the effective number of relativistic degrees
of freedom in the universe as dark radiation, which has been recently measured
by several experiments, e.g., PLANCK. We calculate the contribution to dark
radiation from the decay of a scalar particle via the superheavy dark matter in
the loop. Interestingly enough, this scenario will be probed by a future LHC
run in the invisible decay signatures of the Higgs boson.

15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc