Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Energy of the Universe, the Scaling-Dependent Coupling Constant
  $\beta$ and the Pion Mass   From the hypothesis of a quadratic dependence of the binding energy of the
quarks on the length scale and from the idea of a universal running coupling
constant, we get the closure mass of the Universe and the pion mass. Besides
this, we propose a free energy for the pions which stationarity condition leads
to a closed form for the pion mass as a function of the Planck mass and of the
Hubble constant.

15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex