Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral-dispersive calculations of pion-pion scattering confront
  experiment   In a series of papers we have applied several sum rules and forward
dispersion relations, to pion-pion scattering. We have found that some widely
used data sets fail to satisfy these constraints, and we have provided an
amplitude that describes data consistently with the dispersive tests.
Furthermore, we noted that the input and precision claimed in a Roy equation
analysis by Colangelo, Gasser and Leutwyler, lead to several mismatches with
some sum rules. Subsequently, Caprini, Colangelo, Gasser and Leutwyler claimed
that our Regge parametrization was incorrect. We collect here the answers to
their various claims, and try to clarify the points of agreement and
disagreement, showing experimental evidence that substantiates our results, and
that, in addition, their representation fails to satisfy all three forward
dispersion relations up to sqrt{s}<=800 MeV by several standard deviations.

16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol