Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: \Omb \rightarrow \Omc , \Omc ^* $ transitions: Model-independent bounds
  on invariant form factors   In this note we report some model-independent bounds involving transition
form factors for $ \Omb \rightarrow \Omc $ and $ \Omb \rightarrow \Omc ^* $ and
the nonperturbative matrix elements of the $ \Omb $ system. They are derived by
using operator product expansion (OPE) in Heavy Quark Effective Theory .

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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: cs
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: stat
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The categories of this paper are: math
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th