TY - JOUR
T1 - Isospin in B decays and the (B0B̄0)/(B+B-) production ratio
AU - Gronau, Michael
AU - Grossman, Yuval
AU - Rossner, Jonathan L.
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=33644903748&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.73.057501
DO - 10.1103/PhysRevD.73.057501
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AN - SCOPUS:33644903748
SN - 1550-7998
VL - 73
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 5
M1 - 057501
ER -