Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of the Decay Omega_C^0 --> Omega- e+ nu_e   Using the CLEO detector at the Cornell Electron Storage Ring, we have
observed the Omega_c (css ground state) in the decay Omega_c -> Omega- e+ nu.
We find a signal of 11.4 +- 3.8 (stat) events. The probability that we have
observed a background fluctuation is 7.6 x 10-5. We measure BF(Omega_c ->
Omega- e+ nu) x sigma(e+ e- -> Omega_c X) = (42.2 +- 14.1 (stat) +- 5.7 (syst))
fb and R = Gamma(Omega_c -> Omega- pi+)/Gamma(Omega_c -> Omega- e+ nu) = 0.41
+- 0.19 (stat) +- 0.04 (syst). This is the first statistically significant
observation of an individual decay mode of the Omega_c in e+ e- annhiliation,
and the first example of a baryon decaying via beta-emmision, where no quarks
from the first generation participate in the reaction.

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The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
3
The categories of this paper are: physics
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The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat