Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase Motion in the Scalar Low-Mass pi+pi- Amplitude in D+ -> pi-pi+pi+
  Decay   Applying the Amplitude Difference method to Fermilab experiment E791 D+ ->
pi-pi+pi+ data, we measure the low mass pi+pi- phase motion. Our results
suggest a significant phase variation, compatible with the existence of an
isoscalar sigma(500) meson, as previously reported using an isobar model fit to
the full Dalitz-plot density.

24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph