Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A measurement of the rate of wrong-sign decays D0 -> K+ pi-   A D0 meson can decay to K+ pi- through doubly Cabibbo-suppressed decay or via
D0-D0bar mixing. With 46.2 fb^{-1} of integrated luminosity collected by Belle,
we have measured the time integrated rate of the wrong-sign process D0 -> K+
pi- relative to that of the Cabibbo-favored process D0 -> K- pi+ to be R_WS =
(0.372 +- 0.025 +0.009/-0.014) % (preliminary). The D0-D0bar mixing parameters
can be derived from the time distribution of the wrong-sign process.

20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math