Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spontaneous Lorentz symmetry breaking and one-loop effective action in
  the metric-affine bumblebee gravity   In this contribution, we study the metric-affine bumblebee model coupled to
fermions. Proceeding in a manner different from [1, 2], we find the exact
result for the fermionic determinant in the Einstein frame, including all
orders in the non-minimal coupling $\xi$. We demonstrate that the axial
contributions are at least of second order in the perturbative expansion of
$\xi$. Furthermore, we compute the one-loop effective potential within the weak
field approximation.

37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th