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Using the soft-collinear effective theory we derive the factorization theoremfor the decays B-> M1 M2 with M{1,2}= pi,K, rho,K*, at leading order inLambda/E_M and Lambda/mb. The results derived here apply even if alpha_s(E_MLambda) is not perturbative, and we prove that the physics sensitive to theE*Lambda scale is the same in B-> M1 M2 and B-> M form factors. We argue thatc-cbar penguins could give long-distance effects at leading order. Decays totwo transversely polarized vector mesons are discussed. Analyzing B-> pi pi wefind predictions for B^0 -> pi^0 pi^0 and |V_{ub}| f_+(0) as a function ofgamma.Comment: 10 pages, v2 phenomenological analysis of B->pi pi adde

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:msub><mml:mi>M</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:msub><mml:mi>M</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>: Factorization, charming penguins, strong phases, and polarization

B→M1M2: Factorization, charming penguins, strong phases, and polarization