Isospin in B decays and the (B0B̄0)/(B+B-) production ratio

Michael Gronau, Yuval Grossman, Jonathan L. Rossner

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Methods are proposed for measuring the ratio R+/0=Γ(Υ(4S) →B+B-)/Γ(Υ(4S)→B0B̄0) without assuming isospin invariance in exclusive hadronic decays such as B→J/ψK. The validity of isospin invariance in various B decays is discussed. Isospin violations are expected to be especially small in inclusive semileptonic decays, so that Γ(B+→Xc0+ν)=Γ(B0→Xc-+ν) is expected to hold at the subpercent level. Suggestions are made for utilizing this relation. The accuracy of a "double-tag" method for obtaining R+/0, such as that used for measuring the D+D-/D0D̄0 ratio at the ψ′′≡ψ(3770) , is also estimated.

Original languageEnglish
Article number057501
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number5
StatePublished - 2006
Externally publishedYes


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