hep-ph/9906269 Isospin Violation in B → ππ Decays ∗

  title={hep-ph/9906269 Isospin Violation in B → ππ Decays ∗},
  author={Susan Gardner},
An isospin analysis of B → ππ decays yields sin 2α, where α is the usual CKM angle α ≡ arg[−V td V * tb /(V ud V * ub)] without hadronic uncertainty if isospin is a perfect symmetry. Yet isospin symmetry is broken not only by electroweak effects but also by the u and d quark mass difference — the latter drives π 0 − η, η ′ mixing and converts the isospin… CONTINUE READING

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