Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Decaying Ultra Heavy Dark Matter (WIMPZILLA): Review of Recent
  Progress   Recent theoretical and observational motivations for existence of a decaying
Ultra Heavy Dark Matter (UHDM) are reviewed. We show that present data from
Ultra High Energy Cosmic Rays (UHECRs) and SN - Ia are compatible with a
relatively short lifetime of UHDM.

16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph