ar X iv : h ep - p h / 05 03 09 1 v 2 1 1 M ar 2 00 5 Possibility of Large EW Penguin contribution 1

We discuss a possibility of large electroweak (EW) penguin contribution in B → Kπ and ππ. The recent experimental data may be still suggesting that there are some discrepancies between the data and theoretical estimations. In B → Kπ decays, to explain several theoretical relations among the branching ratios, a slightly large electroweak penguin contribution and large strong phase differences or quite large color suppressed tree contribution seem to be needed. The contributions should appear also in B → ππ. We show, as an example, a solution to solve the discrepancies in both B → Kπ and B → ππ. It may be suggesting to need the large electroweak penguin contribution with new weak phases and some SU(3) breaking effects by new physics in both QCD and electroweak penguin type processes.