Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Jet substructure in ATLAS   Measurements are presented of the jet invariant mass and substructure in
proton-proton collisions at sqrt{s} = 7 TeV with the ATLAS detector using an
integrated luminosity of 37 pb-1. These results exercise the tools for
distinguishing the signatures of new boosted massive particles in the hadronic
final state. Two "fat" jet algorithms are used, along with the filtering jet
grooming technique that was pioneered in ATLAS. New jet substructure
observables are compared for the first time to data at the LHC. Finally, a
sample of candidate boosted top quark events collected in the 2010 data is
analyzed in detail for the jet substructure properties of hadronic "top-jets"
in the final state. These measurements demonstrate not only our excellent
understanding of QCD in a new energy regime but open the path to using complex
jet substructure observables in the search for new physics.

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The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas
3
The categories of this paper are: physics
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol