Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Final-state interaction phase difference in $J/\psi\to\rho\eta$ and
  $\omega\eta$ decays   It is shown that the study of the $\omega-\rho^0$ interference pattern in the
$J/\psi\to (\rho^0+\omega)\eta\to\pi^+\pi^-\eta$ decay provides the evidence
for the large (nearly $90^\circ$) relative phase between the one-photon and the
three-gluon decay amplitudes.

19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom