Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simulation of $e^+e^-\rightarrow\mbox{Hadrons}$ and Comparison to ALEPH
  Data at Full Detector Simulation with an Emphasis on Four-Jet States   We use the SHERPA Monte Carlo generator to simulate the process
$e^+e^-\rightarrow\mbox{hadrons}$ using matrix elements with up to six partons
in the final state. Two samples of SHERPA events are generated. In the "LO"
sample, all final states are generated with leading order matrix elements; in
the "NLO" sample, matrix elements for final states with up to four partons are
generated at next-to-leading order, while matrix elements for final states with
five or six partons are generated at leading order. The resulting samples are
then passed through the ALEPH detector simulation. We compare the Monte Carlo
samples to each other, to samples generated using the KK2f generator interfaced
with PYTHIA, and to the archived ALEPH data at both LEP1 and LEP2 energies. We
focus on four-jet observables with particular attention given to dijet masses.
The LO and NLO SHERPA samples show significant improvement over the KK2f
generation for observables directly related to clustering events into four
jets, while maintaining similar performance to KK2f for event-shape variables.
We additionally reweight the dijet masses using LEP1 data and find that this
greatly improves the agreement between the three Monte Carlo samples at LEP2
energies for these observables.

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The categories of this paper are: physics
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an