Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadron production in e+e- annihilation at BaBar, and implication for the
  muon anomalous magnetic moment   The BaBar collaboration has an extensive program of studying hadronic cross
sections in low-energy e+e- collisions, accessible via initial-state radiation.
Our measurements allow significant improvements in the precision of the
predicted value of the muon anomalous magnetic moment. These improvements are
necessary for illuminating the current ~3.6 sigma difference between the
predicted and the experimental values. We have published results on a number of
processes with two to six hadrons in the final state. We report here the
results of recent studies with final states that constitute the main
contribution to the hadronic cross section in the energy region between 1 and 3
GeV, as e+e- to K+K-, pi+pi-, and e+e- to 4 hadrons.

10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin