Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for the Standard Model Higgs Boson in e^+e^- Collisions at
  sqrt{s} = 161-172 GeV   This paper describes a search for the Standard Model Higgs boson using data
from e^+e^- collisions collected at center-of-mass energies of 161, 170 and 172
GeV by the OPAL detector at LEP. The data collected at these energies
correspond to integrated luminosities of 10.0, 1.0 and 9.4 pb^-1, respectively.
The search is sensitive to the main final states from the process in which the
Higgs boson is produced in association with a fermion anti-fermion pair, namely
four jets, two jets with missing energy, and two jets produced together with a
pair of electron, muon or tau leptons. One candidate event is observed, in
agreement with the Standard Model background expectation. In combination with
previous OPAL searches at center-of-mass energies close to the Z^0 resonance
and the revised previous OPAL searches at 161 GeV, we derive a lower limit of
69.4 GeV for the mass of the Standard Model Higgs boson at the 95% confidence
level.

27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
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The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an