Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exploring CP Violation with B_d -> D K_s Decays   We (re)examine CP violation in the decays B_d -> D K_s, where D represents
D^0, D(bar), or one of their excited states. The quantity $\sin^2(2\beta +
\gamma)$ can be extracted from the time-dependent rates for $B_d(t) -> {\bar
D}^{**0} K_s$ and $B_d(t) -> D^{**0} K_s$, where the $D^{**0}$ decays to
$D^{(*)+}\pi^-$. If one considers a non-CP-eigenstate hadronic final state to
which both D(bar) and D^0 can decay (e.g. $K^+\pi^-$), then one can obtain two
of the angles of the unitarity triangle from measurements of the time-dependent
rates for $B_d(t) -> (K^+\pi^-)_{D K_s}$ and $B_d(t) -> (K^-\pi^+)_{D K_s}$.
There are no penguin contributions to these decays, so all measurements are
theoretically clean.

35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int