Abstract
An isospin analysis of B→ππ decays yields sin 2α, where α≡arg[-VtdVtb*/(VudV ub*)] and Vij is a CKM matrix element, without hadronic uncertainty if isospin is a perfect symmetry. Isospin, however, is broken not only by electroweak effects but also by the u and d quark mass difference. The latter drives π0-η,η′ mixing and converts the isospin-perfect triangle relation between the B→ππ amplitudes to a quadrilateral. The combined isospin-violating effects impact the extracted value of sin 2α in a significant manner, particularly if the latter is small.
Original language | English |
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Article number | 077502 |
Pages (from-to) | 1-4 |
Number of pages | 4 |
Journal | Physical review D |
Volume | 59 |
Issue number | 7 |
DOIs | |
State | Published - Apr 1 1999 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)