Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Einstein-Podolsky-Rosen-Bohm experiment with massive particles as a test
  of relativistic center-of-mass position operator   The nonrelativistic singlet state average $\langle \psi|{\vec a}\cdot\vec
\sigma\otimes {\vec b}\cdot\vec \sigma|\psi\rangle =-\vec a\cdot\vec b $ can be
relativistically generalized if one defines spin {\it via\/} the relativistic
center-of-mass operator. The relativistic correction is quadratic in $v/c$ and
can be measured in Einstein-Podolsky-Rosen-Bohm-type experiments with massive
spin-1/2 particles. A deviation from the nonrelativistic formula would indicate
that for relativistic nonzero-spin particles centers of mass and charge do not
coincide.

29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an