Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Distant Possibility of Using a High-Luminosity Muon Source to
  Measure the Mass of the Neutrino Independent of Flavor Oscillations   Short-baseline calculations reveal that if the neutrino were massive, it
would show a beautifully structured difference spectrum; however, this spectrum
seems beyond current experimental reach.
  An interval-timing paradigm would not seem feasible in a short-baseline
experiment; however, interval timing on an Earth-Moon long baseline experiment
might be able to improve current upper limits on the neutrino mass.

28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs