Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gluon Radiation in t\bar{t} Production at the Tevatron p\bar{p} Collider   We present a complete calculation of the matrix elements for the processes $q
\bar q, gg \to b W^+ \bar b W^- g$ and $qg \to b W^+ \bar b W^- q$ which are
relevant for the study of events with an additional jet in $t \bar t$
production at the Tevatron $p \bar p $ collider. Our calculation includes (i)
the contributions from gluons emitted during the top production and decay
stages and the interference between these, and (ii) the complete set of Feynman
diagrams corresponding to both resonant and non-resonant top production. We
study the distribution in phase space of the additional parton jet and make
comparisons with previous studies based on the soft-gluon approximation and
with results from parton-shower Monte Carlo simulations. The implications for
top mass measurements are briefly discussed.

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The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph