Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $Z\to b\bar b$ in $U(1)_R$ Symmetric Supersymmetry   We compute the one-loop corrections to the $Z \to b\bar{b}$ vertex in the
$U(1)_R$ symmetric minimal supersymmetric extension of the standard model. We
find that the predicted value of $R_b$ is consistent with experiment if the
mass of the lighter top squark is no more than 180 GeV. Furthermore, other data
combines to place a lower bound of 88 GeV on the mass of the light top squark.
A top squark in this mass range should be accessible to searches by experiments
at FNAL and LEP.

25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat