Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Model-independent search for the decay B -> l nu gamma   We present a search for the radiative leptonic decay B+ -> l+ nu gamma, where
l=e,mu, using a data sample of 465 million B-meson pairs collected by the BABAR
experiment. In this analysis, we fully reconstruct the hadronic decay of one of
the B mesons in Upsilon(4S) -> B+B- decays, then search for evidence of B+ ->
l+ nu gamma in the rest of the event. We observe no significant evidence of
signal decays and report model-independent branching fraction upper limits of
BR(B+ -> e+ nu gamma)<17e-6, BR(B+ -> mu+ nu gamma)< 24e-6, and BR(B+ -> l+ nu
gamma)<15.6e-6 (l= e or mu), all at the 90% confidence level.

1
The categories of this paper are: cs
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The categories of this paper are: math
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess