Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Update of eta-eta' mixing from J/psi->VP decays   The $\eta$-$\eta^\prime$ mixing angle is deduced from an updated
phenomenological analysis of $J/\psi$ decays into a vector and a pseudoscalar
meson. Corrections due to non-ideal $\omega$-$\phi$ mixing are confirmed to be
crucial to find $\theta_P=(-16.9\pm 1.7)^\circ$, in agreement with most recent
analyses. The newly reported values of $B(J/\psi\to\rho\pi)$ by the BABAR and
BES Collaborations make more difficult a reasonable description of data.

21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con