ar X iv : h ep - p h / 05 12 10 1 v 1 8 D ec 2 00 5 Hard spectator - scattering in B → ππ decays at NNLO ∗
نویسندگان
چکیده
We compute the 1-loop (NNLO) corrections to hard spectator-scattering in tree-dominated hadronic B decays. Depending on the values of hadronic input parameters the corrections are shown to have a significant impact on the B → ππ branching fractions.
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