2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40774We calculate the branching ratios and CP asymmetries of the $B\to ϕK$ decays using perturbative QCD approach, which includes $k_T$ and threshold resummations. Our results of branching ratios are consistent with the experimental data and larger than those obtained from the naive factorization assumption and the QCD-improved factorization approach.15 pages, 5 figures, RevTeX, Minor changes, a reference addedHigh Energy Physics - Phenomenologytext