Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A light $Z^\prime$ for the $R_K$ puzzle and nonstandard neutrino
  interactions   We show that the $R_K$ puzzle in LHCb data and the discrepancy in the
anomalous magnetic moment of the muon can be simultaneously explained if a 10
MeV mass $Z^\prime$ boson couples to the muon but not the electron, and that
clear evidence of the nonstandard matter interactions of neutrinos induced by
this coupling may be found at DUNE.

7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys