Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational leptogenesis, C, CP and strong equivalence   The origin of matter-antimatter asymmetry is one of the most important
outstanding problems at the interface of particle physics and cosmology.
Gravitational leptogenesis (baryogenesis) provides a possible mechanism through
explicit couplings of spacetime curvature to appropriate lepton (or baryon)
currents. In this paper, the idea that these strong equivalence principle
violating interactions could be generated automatically through quantum loop
effects in curved spacetime is explored, focusing on the realisation of the
discrete symmetries C, CP and CPT which must be broken to induce
matter-antimatter asymmetry. The related issue of quantum corrections to the
dispersion relation for neutrino propagation in curved spacetime is considered
within a fully covariant framework.

29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics