Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible pre-LEP200 SUSY threshold signals   If $R$-parity is not conserved, the SUSY-threshold production process $e^+e^-
\to \chi_1^0\chi_1^0$ could be detectable with relatively low luminosity. Hence
an interesting mass range for the lightest SUSY particle $\chi_1^0$ could be
explored at the CERN LEP collider during its intermediate energy development,
even before the full LEP200 upgrade is completed. We present cross section
formulas and discuss event rates and detection for the three distinct decay
options: $\chi_1^0\to 2\, {\rm charged \; leptons}\, +\, {\rm neutrino}$,
$\chi_1^0\to {\rm lepton}\, +2\, {\rm quarks}$, and $\chi_1^0\to 3\, {\rm
quarks}$.

32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con