Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: QCD Factorization in B -> pi K, pi pi Decays and Extraction of
  Wolfenstein Parameters   In the heavy-quark limit, the hadronic matrix elements entering nonleptonic
$B$-meson decays into two light mesons can be calculated from first principles
including ``nonfactorizable'' strong-interaction corrections. The $B\to\pi
K,\pi\pi$ decay amplitudes are computed including electroweak penguin
contributions, SU(3) violation in the light-cone distribution amplitudes, and
an estimate of power corrections from chirally-enhanced terms and annihilation
graphs. The results are then used to reduce the theoretical uncertainties in
determinations of the weak phases $\gamma$ and $\alpha$. In that way, new
constraints in the $(\bar\rho,\bar\eta)$ plane are derived. Predictions for the
$B\to\pi K, \pi\pi$ branching ratios and CP asymmetries are also presented. A
good global fit to the (in part preliminary) experimental data on the branching
fractions is obtained without taking recourse to phenomenological models.

36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ