We discuss the relationship between the graphical amplitudes T, C, P,... used to parameterize non-leptonic B decay amplitudes, and matrix elements of operators in the soft-collinear effective theory (SCET) at leading order in Lambda/m(b). Using the SU(3) flavor symmetry of the weak Hamiltonian we derive all-order constraints on the Wilson coefficients of SCET operators. (C) 2004 Published by Elsevier B.V.
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