Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of Rapidity Gap Events in Hadronic Z Decays with L3 detector   Rapidity gaps have been studied in well separated completely symmetric 3 jet
events from hadronic Z decays to search for colour singlet exchange.
Asymmetries in particle flow and angular separation, defined with respect to
the inter-jet regions, are found to be sensitive to the exchange of a colour
singlet object instead of a colour octet gluon. %Comparing data from the L3
experiment with Monte Carlo predictions, %a limit is obtained on the fraction
%of colour singlet exchange in data. From a comparison of the distributions
observed in the L3 experiment and Monte Carlo predictions, a limit is obtained
on the fraction of colour singlet exchange in data.

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The categories of this paper are: cs
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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: hep-th
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The categories of this paper are: math
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: acc-phys