How isospin violation mocks "new" physics: π0-η,η′ mixing in B→ππ decays

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


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 languageEnglish
Article number077502
Pages (from-to)1-4
Number of pages4
JournalPhysical review D
Issue number7
StatePublished - Apr 1 1999

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'How isospin violation mocks "new" physics: π0-η,η′ mixing in B→ππ decays'. Together they form a unique fingerprint.

Cite this