Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mass splittings and matrix elements of mesons and baryons containing a
  single heavy quark   We present a study in the quenched approximation of the $B$ parameter $B_B$
and the decay constant $f_B$ using heavy-quark propagators implemented in the
static approximation, and light-quark propagators computed using an
$O(a)$-improved fermion action. We find a value of $\Bbstat$ close unity, and
discuss the systematic errors entering into the calculation. $\fbstat$ is
extracted using a variational fitting technique in order to obtain a reliable
estimate of the ground state.
  In the second part of the talk, we describe an exploratory study of baryons
containing a single heavy quark, computed using the $O(a)$-improved fermion
action. We obtain masses generally in good agreement with experiment in both
the charm and beauty sectors. We also report preliminary results for the form
factor $G_1$ in the semi-leptonic $\Lambda_b \rightarrow \Lambda_c$ transition.

32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th