Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Seesaw Right Handed Neutrino as the Sterile Neutrino for LSND   We show that a double seesaw framework for neutrino masses with $\mu-\tau$
exchange symmetry can lead to one of the righthanded seesaw partners of the
light neutrinos being massless. This can play the role of a light sterile
neutrino, giving a $3+1$ model that explains the LSND results. We get a very
economical scheme, which makes it possible to predict the full $4\times 4$
neutrino mass matrix if CP is conserved. Once CP violation is included, effect
of the LSND mass range sterile neutrino is to eliminate the lower bound on
neutrinoless double beta decay rate which exists for the three neutrino case
with inverted mass hierarchy. The same strategy can also be used to generate a
natural $3+2$ model for LSND, which is also equally predictive for the CP
conserving case in the limit of exact $\mu-\tau$ symmetry.

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The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas