Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for $D^0 -> \ell^+\ell^-$ decays and for CP violation in
  $D^+_{(s)} \to K_S^0\pi^+$ and $D^+_{(s)} \to K_S^0K^+$ at BELLE   We are reporting on a search for flavour-changing neutral current decays $D^0
\to \mu^+ \mu^-$ and $D^0 \to e^+ e^-$, and for lepton-flavour violating decays
$D^0 \to e^\pm \mu^\mp$, the measurement of $D^+_{(s)} \to K_S^0 \pi^+$ and
$D^+_{(s)}\to K_S^0 K^+$ branching fractions, and the search for CP violation
in $D^+_{(s)} \to K_S^0 \pi^+$ and $D^+_{(s)} \to K_S^0 K^+$ decays. The
analyses are based on 600 fb$^{-1}$ to 700 fb$^{-1}$ of data collected in
$e^+e^-$ collisions at the centre-of-mass (CM) energy of the $\Upsilon(4S)$
resonance and 60 MeV below by the Belle detector at the KEKB collider.

29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th