Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New Way to Limit the Interaction of Dark Matter with Baryons   Recently, there had been renewed interest in limiting the interaction between
dark matter particles and known particles. I propose a new way to set upper
limits on the coupling of ions or electrons to dark matter particles of
arbitrary mass, based on Faraday's Law in a spinning conductor.

16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys