Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New models with independent dynamical torsion and nonmetricity fields   We propose a gravitational model which allows the independent dynamical
behaviour of the torsion and nonmetricity fields to be displayed in the
framework of Metric-Affine gauge theory of gravity. For this task, we derive a
new exact black hole solution referred to this model which extends the role of
torsion of the main well-known exact solutions based on Weyl-Cartan geometry
and constitutes the first known isolated gravitational system characterized by
a metric tensor with independent spin and dilation charges.

4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg