Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Z$ decay into a bottom quark, a light sbottom and a light gluino   The discrepancy between the measured and theoretical production cross section
of $b$ quarks at the Tevatron can probably be explained by the recently
proposed scenario of light gluinos of mass 12-16 GeV and light sbottoms of mass
$2-5.5$ GeV. In this scenario, we study a related process at the $Z$ pole, $Z
\to b \tilde{b}_1^* \tilde{g} + \bar b \tilde{b}_1 \tilde{g}$ followed by
$\tilde{g} \to b \tilde{b}_1^* / \bar b \tilde{b}_1$. The hadronic branching
ratio for this channel is $(1-3) \times 10^{-3}$, which is of order of the size
of the uncertainty in $R_b$. We find that a typical event consists of an
energetic prompt bottom-jet back-to-back with a ``fat'' bottom-jet, which
consists of a bottom quark and two bottom squarks. Such events with a $10^{-3}$
branching ratio may affect the measurement of $R_b$; even more interesting if
the ``fat'' bottom jet can be identified.

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The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph