Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Prospects for rare and forbidden hyperon decays at BESIII   The study of hyperon decays at the Beijing Electron Spectrometer III (BESIII)
is proposed to investigate the events of $J/\psi$ decay into hyperon pairs,
which provide a pristine experimental environment at the Beijing
Electron--Positron Collider II. About $10^{6}$--$10^8$ hyperons, i.e.,
$\Lambda$, $\Sigma$, $\Xi$, and $\Omega$, will be produced in the $J/\psi$ and
$\psi(2S)$ decays with the proposed data samples at BESIII. Based on these
samples, the measurement sensitivity of the branching fractions of the hyperon
decays is in the range of $10^{-5}$--$10^{-8}$. In addition, with the known
center-of-mass energy and "tag technique," rare decays and decays with
invisible final states can be probed.

1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin