Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraint of the MINERvA Medium Energy Neutrino Flux using
  Neutrino-Electron Elastic Scattering   Elastic neutrino scattering on electrons is a precisely-known purely leptonic
process that provides a standard candle for measuring neutrino flux in
conventional neutrino beams. Using a total sample of 810 neutino-electron
scatters after background subtraction, the measurement reduces the
normalization uncertainty on the muon neutrino NuMI flux between 2 and 20 GeV
from 7.5% to 3.9%. This is the most precise measurement of neutrino-electron
scattering to date, will reduce uncertainties on MINERvA's absolute cross
section measurements, and demonstrates a technique that can be used in future
neutrino beams such as LBNF.

27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th