U-spin multiplet approach is applied to the full set of charmless hadronic B+/- -> (MM+/-)-M-0 decays for the purpose of precise extraction of the unitarity angle gamma. Each of the four data sets, (PP+/-)-P-0, (PV+/-)-V-0, (VP+/-)-P-0 and (VV+/-)-V-0 with P equivalent to pseudoscalar and V equivalent to vector, can be used to yield a precise value of gamma. The crucial advantage of this method over the common SU(3) symmetry based quark-diagrammatic approach is that no assumptions regarding relative sizes of topological decay amplitudes need to be made. As a result, this method avoids an uncontrollable theoretical uncertainty that is related to the neglect of some topological diagrams (e.g., exchange and annihilation graphs) in the SU(3) approach. Application of the U-spin approach to the current data yields: gamma = (54(-11)(+12))degrees. We find that improved measurements of phi pi(+/-) and (K) over bar K-*0(+/-) branching ratios would lead to appreciably better extraction of gamma. In this method, which is completely data driven, in a few years we should be able to obtain a model independent determination of gamma with an accuracy of O(few degrees). (c) 2006 Elsevier B.V. All rights reserved.
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