Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: B -> K eta' decay as unique probe of eta' meson   A theory of the B -> K \eta' decay is proposed. It is based on the Cabbibo
favored b -> \bar{c} c s process followed by a direct materialization of the
\bar{c} c pair into the \eta'. This mechanism works due to a non-valence Zweig
rule violating c-quark component of the \eta', which is unique to its very
special nature. This non-perturbative "intrinsic charm" content of the \eta' is
evaluated using the Operator Product Expansion and QCD low energy theorems. Our
results are consistent with an unexpectedly large Br(B -> K \eta') \simeq 7.8
\cdot 10^{-5} recently announced by CLEO.

22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex