Phenomenological applications of k_T factorization

YONG-YEON KEUM

Institute of Physics, Academia Sinica, Nankang 128, Taipei 11529, Taiwan

Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany

E-mail: yykeum@phys.sinica.edu.tw; yykeum@mail.desy.de

Abstract. We discuss applications of the perturbative QCD approach in the exclusive non-leptonic two-body B-meson decays. We briefly review its ingredients and some important theoretical issues on the factorization approach. PQCD results are compatible with present experimental data for charmless B-meson decays. We predict the possibility of large direct CP asymmetry in $B^0 \rightarrow \pi^+\pi^-$ (23 $\pm$ 7%) and $B^0 \rightarrow K^+ \pi^-$ (-17 $\pm$ 5%). We also investigate the branching ratios, CP asymmetry and isospin symmetry breaking in radiative $B \rightarrow (K^* /\rho)\gamma$ decays.

Keywords. Non-leptonic B-decays; k_T factorization; large direct CP violation.

PACS Nos 13.25.Hw; 11.10.Hi; 12.38.Bx; 13.25.Ft