Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravity-induced four-fermion contact interaction implies gravitational
  intermediate W and Z type gauge bosons   Coupling fermions to gravity necessarily leads to a non-renormalizable,
gravitational four-fermion contact interaction. In this essay, we argue that
augmenting the Einstein-Cartan Lagrangian with suitable kinetic terms quadratic
in the gravitational gauge field strengths (torsion and curvature) gives rise
to new, massive propagating gravitational degrees of freedom. This is to be
seen in close analogy to Fermi's effective four-fermion interaction and its
emergent W and Z bosons.

9
The categories of this paper are: nlin
16
The categories of this paper are: stat
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat