It is shown that inclusion of charming penguins of the size suggested by short-distance dynamics may shift down by 10o−15o the value of γ extracted via the overall fit to the B→PP branching ratios. A substantial dependence of the fit on their precise values is found, underscoring the need to improve the reliability of data.
@article{arxiv.hep-ph/0402290,
title = {Charming penguins in B -> PP decays and the extraction of gamma},
author = {P. Zenczykowski},
journal= {arXiv preprint arXiv:hep-ph/0402290},
year = {2010}
}