### Speaker

Dr
Satoshi Mishima
(DESY)

### Description

We show that there exist uncanceled soft divergences in the k_T
factorization for nonfactorizable amplitudes of two-body nonleptonic
B meson decays, similar to those identified in hadron-hadron collisions.
Viewing the special role of the pion as a q-qbar bound state and as
a pseudo Nambu-Goldstone boson, we associate a soft factor with it
in the perturbative QCD formalism. This soft factor enhances the
nonfactorizable color-suppressed tree amplitudes, such that the
branching ratios B(B->pi^0 pi^0) and B(B->pi^0 rho^0) are increased
under the constraint of the B(B->rho^0 rho^0) data, the difference
between the direct CP asymmetries A_{CP}(B->pi^\mp K^\pm) and
A_{CP}(B->pi^0 K^\pm) is enlarged, and the mixing-induced CP
asymmetry S_{pi^0 K_S} is reduced. That is, the known B->pi pi
and B->pi K puzzles can be resolved simultaneously.

### Primary author

Dr
Satoshi Mishima
(DESY)

### Co-author

Prof.
Hsiang-nan Li
(Academia Sinica, Taiwan)