Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Amplitude extraction in pseudoscalar-meson photoproduction: towards a
  situation of complete information   A complete set for pseudoscalar-meson photoproduction is a minimum set of
observables from which one can determine the underlying reaction amplitudes
unambiguously. The complete sets considered in this work involve single- and
double-polarization observables. It is argued that for extracting amplitudes
from data, the transversity representation of the reaction amplitudes offers
advantages over alternate representations. It is shown that with the available
single-polarization data for the p({\gamma},K^+)\Lambda reaction, the energy
and angular dependence of the moduli of the normalized transversity amplitudes
in the resonance region can be determined to a fair accuracy. Determining the
relative phases of the amplitudes from double-polarization observables is far
less evident.

25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph