Graphical amplitudes from SCET

Details Graphical amplitudes from SCET Graphical amplitudes from SCET

2004-08-13

arxiv.org/abs/hep-ph/0408161v2

Phys.Lett. B604 (2004) 183-191

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages; one additional relation included, minor corrections. version published in Physics Letters B

Scientific paper

10.1016/j.physletb.2004.10.047

We discuss the relationship between the graphical amplitudes T, C, P, ... used to parameterize nonleptonic 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 electroweak penguin contributions to the Wilson coefficients of SCET operators.

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