Strategies for fixing the CKM-angle gamma and obtaining experimental insights into the world of electroweak penguins

Using the SU(3) flavour symmetry of strong interactions, we propose strategies for extracting both the CKM-angle gamma and the (b) over bar --> <(u)over bar u>(s) over bar tree-level amplitude T'. We present also an approximate approach using the branching ratios for the modes B+ --> pi(+)K(0), B-d(0) --> pi(-)K(+), <(B)over bar(d)(0)> --> pi(+)K(-) and B+ --> pi(+)pi(0) which should be rather promising from the experimental point of view. The quantities gamma and T' determined this way may well be used as an input to control electroweak penguins in nonleptonic B-decays as has been discussed in previous work. Following these lines, we propose strategies for obtaining quantitative insights into the physics of the electroweak penguin operators and performing some consistency checks. As a by-product, we derive an upper bound of 6 degrees for the uncertainty originating from electroweak penguins in the alpha-determination by means of B --> eta eta decays.