Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lepton Flavor Violation and the Tau Neutrino Mass   We point out that, in the left-right symmetric model of weak interaction, if
$\nu_\tau$ mass is in the keV to MeV range, there is a strong correlation
between rare decays such as $\tau \rightarrow 3 \mu, \tau \rightarrow 3 e$ and
the $\nu_\tau$ mass. In particular, we point out that a large range of
$\nu_\tau$ masses are forbidden by the cosmological constraints on
$m_{\nu_\tau}$ in combination with the present upper limits on these processes.

27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph