A model independent construction of the unitarity triangle

Yuval Grossman, Yosef Nir, Mihir P. Worah

Research output: Contribution to journalArticlepeer-review

108 Scopus citations


In a large class of models, the only significant new physics effect on the CP asymmetries in B → ψKs and B → ππ decays is a new contribution to the B - B̄ mixing amplitude. This allows a model independent construction of the CKM Unitarity Triangle (up to hadronic uncertainties). Furthermore, the contributions to the mixing from the Standard Model and from the new physics can be disentangled. A serious obstacle to this analysis is an eightfold discrete ambiguity in solving for the angles of the triangle. Several ways to reduce the ambiguity either by making further measurements, or by making further assumptions about the nature of the new physics are described.

Original languageEnglish
Pages (from-to)307-313
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - 4 Sep 1997
Externally publishedYes


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