Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 33: Flavourphysik 1 (Theorie)

T 33.3: Talk

Monday, March 9, 2015, 17:15–17:30, K.12.20 (K2)

B → ππ form factors in QCD factorization — •Philipp Böer, Thorsten Feldmann, and Danny van Dyk — Universität Siegen

The B→ ππ form factors are an essential ingredient for the calculation of e.g. the branching fraction of B→ ππ ℓ ν and the three-body decay B→πππ. We expect these form factors to fullfil a factorization theorem as long as the dipion invariant mass is large, k² ≃ m_b². We explicitly check this factorization theorem by calculating the leading terms in a combined expansion in the strong coupling and powers of Λ_QCD/m_b.