Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The effect of a late decaying scalar on the neutralino relic density   If the energy density of the Universe before nucleosynthesis is dominated by
a scalar field phi that decays and reheats the plasma to a temperature T_{RH}
smaller than the standard neutralino freeze out temperature, the neutralino
relic density differs from its standard value. In this case, the relic density
depends on two additional parameters: T_{RH}, and the number of neutralinos
produced per phi decay per unit mass of the phi field. In this paper, we
numerically study the neutralino relic density as a function of these reheating
parameters within minimal supersymmetric standard models and show that the dark
matter constraint can almost always be satisfied.

29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc