Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Leptogenesis with Majorana neutrinos   I review the origin of the lepton asymmetry which is converted to a baryon
excess at the electroweak scale. This scenario becomes more attractive if we
can relate it to other physical phenomena. For this reason I elaborate on the
conditions of the early universe which lead to a sizable lepton asymmetry. Then
I describe methods and models which relate the low energy parameters of
neutrinos to the high energy (cosmological) CP-violation and to neutrinoless
double beta-decay.

37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess