Extrapolating SU(3) breaking from D to B decays

Michael Gronau, Dan Pirjol

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We consider two SU(3) breaking parameters R1(mB) and R2(mB) appearing in a relation between B+ →Kπ and B+→ππ amplitudes, which plays an important role in determining the weak phase γ. In the heavy quark limit, we identify an isospin-related quantity R2(mD) measured in D decays, exhibiting large SU(3) breaking which is likely due to nonfactorizable effects. Applying heavy quark symmetry to semileptonic D and B decay form factors, we find that factorizable SU(3) breaking in R2(mB)/R1(mB) may be significantly larger than estimated from certain model calculations of form factors.

Original languageEnglish
Article number077301
Pages (from-to)1-4
Number of pages4
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume62
Issue number7
DOIs
StatePublished - 1 Oct 2000

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