Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: P-wave dominance in the pd -> 3He pi+ pi- reaction near threshold
  measured with the MOMO experiment at COSY   The cross section of the pd -> 3He pi+ pi - reaction has been measured at the
MOMO facility in a kinematically complete experiment at a c. m. excess energy
of Q = 70 MeV. The energy and angular distributions show that the reaction is
dominated by p-wave pi+ pi- pairs. This is in complete contrast to the results
of inclusive measurements at somewhat higher energies which show a strong
s-wave ABC enhancement at low pi pi masses. There are however indications of
p-wave pion pairs from other experiments at low Q.

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The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an