Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Lattice Study of Semi-leptonic Decays of $D$-Mesons   We present results of a lattice computation of the matrix elements of the
vector and axial-vector currents which are relevant for the semi-leptonic
decays $D \rightarrow K$ and $D \rightarrow K^*$. The computations are
performed in the quenched approximation to lattice QCD on a $24^3 \times 48$
lattice at $\beta=6.2$ using an $O(a)$-improved fermionic action.

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The categories of this paper are: atom-ph
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The categories of this paper are: physics
8
The categories of this paper are: hep-ex
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The categories of this paper are: eess
2
The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin