  U-spin multiplet approach is applied to the full set of charmless hadronic
B+/- --> M0 M+/- decays for the purpose of precise extraction of the unitarity
angle gamma. Each of the four data sets, P0 P+/-, P0 V+/-, V0 P+/- and V0 V+/-,
with P = pseudoscalar and V = 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^{+12}_{-11} degrees. We find that improved measurements of phi pi+/-
and K*0bar K+/- 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).

High Energy Physics - Phenomenology