Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On sterile neutrino mixing with \nu_{\tau}   Matrix element $U_{\tau N}$ of sterile neutrino N mixing with $\nu_{\tau}$ is
the least constrained in the literature among the three $U_{\alpha N}$
($\alpha=e,\mu,\tau$) mixing parameters characterizing the sterile neutrino
phenomenology. We study the contribution of massive dominantly sterile
neutrinos to purely leptonic $\tau$-decays and semileptonic decays of $\tau$
and K, D mesons. We consider some decays allowed in the Standard Model (SM) as
well as Lepton Flavor and Lepton Number Violating (LFV, LNV) decays forbidden
in the SM. From the existing experimental data on the branching ratios of these
processes we derived new limits on $U_{\tau N}$ more stringent than the ones
existing in the literature. These limits are extracted in a model independent
way without any ad hoc assumptions on the relative size of the three different
sterile neutrino mixing parameters.

34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg