Fat penguins and imaginary penguins in perturbative QCD
2001; Elsevier BV; Volume: 504; Issue: 1-2 Linguagem: Inglês
10.1016/s0370-2693(01)00247-7
ISSN1873-2445
AutoresYong-Yeon Keum, Hsiang-nan Li, A. I. Sanda,
Tópico(s)Particle physics theoretical and experimental studies
ResumoWe evaluate $B\to K\pi$ decay amplitudes in perturbative QCD picture. It is found that penguin contributions are dynamically enhanced by nearly 50% compared to those assumed in the factorization approximation. It is also shown that annihilation diagrams are not negligible, and give large strong phases. Our results for branching ratios of $B\to K\pi$ decays for a representative parameter set are consistent with data. We evaluate $B\to K\pi$ decay amplitudes in perturbative QCD picture. It is found that penguin contributions are dynamically enhanced by nearly 50% compared to those assumed in the factorization approximation. It is also shown that annihilation diagrams are not negligible, and give large strong phases. Our results for branching ratios of $B\to K\pi$ decays for a representative parameter set are consistent with data.
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