Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precision Tests of Flavor and CP violation in B Decays   Isospin and flavor SU(3) set stringent bounds on penguin pollution in
$B^0(t)\to \rho^+\rho^-$, providing a theoretically precise determination of
$\alpha\equiv \phi_2 $, $\alpha = (91\pm 7_{\rm exp}\pm 3_{\rm th})^\circ$.
Isospin breaking in a sum rule for $B\to K\pi$ rates is shown to be suppressed.
A similar sum rule holds for CP asymmetries in $B\to K\pi$. Violation of these
sum rules would be evidence for an anomalous $\Delta I=1$ piece in ${\cal
H}_{\rm eff}$.

22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
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
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int