Testing the standard model with B<inf>s</inf><sup>0</sup>→K <sup>+</sup>K<sup>-</sup> decays

David London, Joaquim Matias

Research output: Contribution to journalArticleResearchpeer-review

27 Citations (Scopus)


In the limit of flavor SU(3) symmetry, the amplitudes for B d0→π+π- and B s0→K+K- are related to one another. Taking the values of the weak phases β and γ from independent measurements, the ratio Rds ≡ BR(B s0→K+K-)/BR(Bd0→π+π-) and the two B d0→π+π- CP asymmetries Adir and Amix depend on only two quantities. By measuring these three observables, one can test for the presence of physics beyond the standard model. In this paper, using present data, and including theoretical uncertainties due to SU(3) breaking, we perform such an analysis. The experimental errors are still very large, but with improved measurements from Babar, Belle and CDF this will be a useful method to search for new physics.
Original languageEnglish
Article number031502
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number3
Publication statusPublished - 15 Aug 2004


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