Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of the (rho, omega, phi) mixing on the dipion mass spectrum in
  e+ e- annihilation and tau decay   A way to explain the puzzling difference between the pion form factor as
measured in e+ e- annihilations and in tau decays is discussed. We show that
isospin symmetry breaking, beside the already identified effects, produces also
a full mixing between the rho0, omega and phi mesons which generates an isospin
0 component inside the rho0 meson. This effect, not accounted for in current
treatments of the problem, seems able to account for the apparent mismatch
between e+ e- and tau data below the phi mass.

19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph