Decay rates of the B-meson are studied through charmless and strangless transitions into π, ρ , ω and γ systems. The important features of these modes are their clean signatures. The CLEO II collaboration has recently reported the value BR(B0 → π +π −) = (1.3 +0.8 −0.6 ± 0.2) × 10−5 . This value is tests our approach to nonleptonic B-decays within the standard model (SM). Since B → γγ is far beyond our experimental reach, we believe that the correct determination of the order of magnitude ∼ 10−10 for BR(B → γγ) provides the most reliable value needed at this moment. The most recent experimental report by the CLEO collaboration on BR(B → K∗γ) = (4.5 ± 1.5 ± 0.9) × 10−5 represents a confirmation of our SM prediction for the B → K∗γ decay. This experimental result, despite of its great importance for the SM and the physics beyond the SM, enables us to predict the value BR (B → ργ) ∼= (3.5 ± 3.3) × 10−6 .Proučavani su raspadi B-mezona bez promjene šarma i stranosti u π, ρ, ω i γ konačna stanja. Važna osobina ovih modova su njihovi čisti eksperimentalni signali. CLEO II kolaboracija nedavno je objavila vrijednost BR(B0 → π +π −) = (1.3 +0.8 −0.6 ± 0.2) × 10−5 . Ta se vrijednost može upotrijebiti za test našeg pristupa objašnjenju neleptonskih B-raspada unutar standardnog modela (SM). Budući je B → γγ daleko izvan našeg eksperimentalnog dosega, vjerujemo da korektno određeni red veličine ∼ 10−10 za BR(B → γγ) predstavlja najrealniju vrijednost potrebnu u ovom trenutku. Najnoviji eksperimentalni izvještaj CLEO kolaboracije o mjerenju BR(B → K∗γ) = (4.5 ± 1.5 ± 0.9) × 10−5 predstavlja potvrdu naše teoretske (SM) predikcije B → K∗γ raspada. Taj eksperimentalni rezultat i pored važnosti za standardni model i fiziku izvan tog modela omogućuje nam predikciju jakosti raspada BR(B → ργ) ≃ (3.5 ± 3.3) × 10−6
