2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/179923The perturbative QCD approach is based on $k_T$ factorization, including the Sudakov form factors so that to avoid the endpoint singularity. In this approach, we calculate the charmless B decays like $B\to ππ$ decays etc. to produce the right number of branching ratios and also CP asymmetry parameters. For final states with at least one charmed meson, like $B\to Dπ$ decays, our results also agree with the experiments.7 pages, with 1 figure, proceedings of the International Conference On Nonperturbative Quantum Field Theory: Lattice And Beyond, 18-20 Dec 2004, Guangzhou, Canton, ChinaHigh Energy Physics - Phenomenologytext