Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The particle emitter size dependence on energy in $e^+ e^-$
  annihilations into hadrons   The nearly energy independent hadron emitter dimension $r$, measured in
$e^+e^-$ annihilation in the energy range 10 to 91 GeV via the Bose-Einstein
correlation of two identical charged pions, is shown to be well accounted for
by choosing the hadron jets as independent pion sources. To this end the known
normalised factorial cumulant moments dependence on particle sources is adapted
to the Bose-Einstein correlation formalism to yield a relation between $r$ and
these sources. This approach is also able to account for the measured $r$
values obtained for the $Z^0$ decays into two and three hadron jets. Finally
the estimated $r$ value of the hadronic $\Upsilon(9.46)$ decay via three gluons
is expected to be higher by about 6 to 11 % over that predicted for its one
photon hadronic decay mode.

16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math