Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Complete Experiments for Pion Photoproduction   The possibilities of a model-independent partial wave analysis for pion, eta
or kaon photoproduction are discussed in the context of complete experiments.
It is shown that the helicity amplitudes obtained from at least 8 polarization
observables including beam, target and recoil polarization can not be used to
analyze nucleon resonances. However, a truncated partial wave analysis, which
requires only 5 observables will be possible with minimal model assumptions.

25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg