Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Massive Neutrinos as Probe of Higher Unification   There are strong indications for neutrino masses and mixings in the data on
solar neutrinos as well as in the observed deficit of muon neutrinos from the
atmosphere. The COBE data and other analysis of the large scale structure in
the Universe also seems to require a hot component in the universe's dark
matter, which can be interpreted as a massive neutrino with mass in the few eV
range. Non-zero neutrino mass is a strong indication of a new local $B-L$
symmetry of electro-weak interactions . In particular, it is noted that the
simplest picture based on the left-right symmetric unification with a high
scale for the $B-L$ symmetry (as well as the scale of the right-handed gauge
boson $W_R$) as required by the constraints of grandunification and present LEP
data in a minimal $SO(10)$ model, can accomodate the solar neutrino data and a
weak hot dark matter neutrino but not the atmospheric neutrino puzzle. A model
with low scale $W_R$ ( in the TeV range) where the Dirac mass of the neutrino
arises at the one loop level can also do the same job. The low $W_R$ picture
can be tested in many rare decay experiments.

24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc