Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurements of low energy e+e- hadronic cross sections and implications
  for the muon g-2   Numerous channels of the cross section e+e- --> hadrons have been measured by
the BABAR experiment using the ISR method. For the pi+pi-(gamma) and
K+K-(gamma) channels, BABAR has pioneered the method based on the ratio between
the hadronic mass spectra and mu+mu-(gamma). Many systematic uncertainties
cancel in the ratio, hence the precise measured cross sections. These
measurements have been exploited for phenomenological studies, like the
determination of the hadronic contribution to the anomalous magnetic moment of
the muon (g-2)_mu.

4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph