Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A likelihood-based reconstruction algorithm for top-quark pairs and the
  KLFitter framework   A likelihood-based reconstruction algorithm for arbitrary event topologies is
introduced and, as an example, applied to the single-lepton decay mode of
top-quark pair production. The algorithm comes with several options which
further improve its performance, in particular the reconstruction efficiency,
i.e., the fraction of events for which the observed jets and leptons can be
correctly associated with the final-state particles of the corresponding event
topology. The performance is compared to that of well-established
reconstruction algorithms using a common framework for kinematic fitting. This
framework has a modular structure which describes the physics processes and
detector models independently. The implemented algorithms are generic and can
easily be ported from one experiment to another.

35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an