Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Validity of the one-body current for the calculation of form factors in
  the point form of relativistic quantum mechanics   Form factors are calculated in the point form of relativistic quantum
mechanics for the lowest energy states of a system made of two scalar particles
interacting via the exchange of a massless boson. They are compared to the
exact results obtained by using solutions of the Bethe-Salpeter equation which
are well known in this case (Wick-Cutkosky model). Deficiencies of the
point-form approach together with the single-particle current are emphasised.
They point to the contribution of two-body currents which are required in any
case to fulfil current conservation.

7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th