Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Absolute determination of D_s branching ratios and f_{D_s} extraction at
  a neutrino factory   A method for a direct measurement of the exclusive D_s branching ratios and
of the decay constant f_{D_s} with a systematical error better than 5% is
presented. The approach is based on the peculiar vertex topology of the
anti-neutrino induced diffractive charm events. The statistical accuracy
achievable with a neutrino factory is estimated.

31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
1
The categories of this paper are: cs