Charming penguin contributions to B => K \pi

Abstract

We present calculations of the charming-penguin long-distance contributions to B => K \pi decays due to intermediate charmed meson states. Our calculation is based on the Chiral Effective Lagrangean for light and heavy mesons, corrected for the hard pion and kaon momenta. We find that the charming-penguin contributions increase significantly the B => K \pi decay rates in comparison with the short-distance contributions, giving results in better agreement with experimental data.

Comments: 13 pages LaTeX (uses RevTeX and epsfig), 3 figures. Corrected typos. To appear in Physical Review D