Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Consequences of f(R)-theories of gravity on gravitational leptogenesis   f(R)-theories of gravity are reviewed in the framework of the
matter-antimatter asymmetry in the Universe. The asymmetry is generated by the
gravitational coupling of heavy (Majorana) neutrinos with the Ricci scalar
curvature. In order that the mechanism works, a time varying non-zero Ricci
curvature is necessary. The latter is provided by f(R) cosmology, whose
Lagrangian density is of the form {\cal L}(R)\sim f(R). In particular we study
the cases f(R)\sim R+\alpha R^n and f(R)\sim R^{1+\epsilon}.

15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph