Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadronic Decays and Lifetimes of B and D Mesons   We review recent experimental results on hadronic decays and lifetimes of
hadrons containing b and c quarks. We discuss charm counting and the
semileptonic branching fraction in B decays, the color suppressed amplitude in
B and D decay, and the search for gluonic penguins in B decay.

28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph