Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Leptogenesis, mass hierarchies and low energy parameters   Leptogenesis in a left-right symmetric model is investigated for all possible
neutrino mass hierarchies. The predictions of the model for low energy
parameters as measured in neutrinoless double beta decay and in oscillation
experiments are compared. The preferred values of the Majorana phases and
limits on the smallest mass state are given. The main observation is that for
the inverse hierarchy observable CP violation in oscillation experiments as
well as a sizable signal in neutrinoless double beta decay can be expected. In
a degenerate scheme, one Majorana phase is bounded to be around pi/2 or pi, and
this ambiguity can easily be tested through neutrinoless double beta decay. The
dependence of the baryon asymmetry on the different "Dirac" and "Majorana"
phases is analyzed and a possibility to avoid the gravitino problem is
discussed.

31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th