Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for lepton-number violating processes in B+ -> h- l+ l+ decays   We have searched for the lepton-number violating processes B+ -> h- l+ l+
with h- = K-/pi- and l+ = e+/mu+, using a sample of 471+/-3 million BBbar
events collected with the BaBar detector at the PEP-II e+e- collider at the
SLAC National Accelerator Laboratory. We find no evidence for these decays and
place 90% confidence level upper limits on their branching fractions Br(B+ ->
pi- e+ e+) < 2.3 x 10^{-8}, Br(B+ -> K- e+ e+) < 3.0 x 10^{-8}, Br(B+ -> pi-
mu+ mu+) < 10.7 x 10^{-8}, and Br(B+ -> K- mu+ mu+) < 6.7 x 10^{-8}.

31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: comp-gas
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga