Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Holographic Dark Energy Characterized by the Total Comoving Horizon and
  Insights to Cosmological Constant and Coincidence Problem   The observed acceleration of the present universe is shown to be well
explained by the holographic dark energy characterized by the total comoving
horizon of the universe ($\eta$HDE). It is of interest to notice that the very
large primordial part of the comoving horizon generated by the inflation of
early universe makes the $\eta$HDE behave like a cosmological constant. As a
consequence, both the fine-tuning problem and the coincidence problem can
reasonably be understood with the inflationary universe and holographical
principle. We present a systematic analysis and obtain a consistent
cosmological constraint on the $\eta$HDE model based on the recent cosmological
observations. It is found that the $\eta$HDE model gives the best-fit result
$\Omega_{m0}=0.270$ ($\Omega_{de0}=0.730$) and the minimal
$\chi^2_{min}=542.915$ which is compatible with $\chi^2_{\Lambda {\rm
CDM}}=542.919$ for the $\Lambda$CDM model.

29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas