Phys. Rev. D 45, 3262–3265 (1992)Measuring the weak isospin of b quarks in e+e- annihilationReceived 22 January 1992; published in the issue dated 1 May 1992 From measurements of the Z decay width to b quarks Γ(Z→bb̅ ) and the forward-backward asymmetry AFB(b) of b quarks at e+e- colliders, the weak-isospin components of the left- and right-handed b quarks can unambiguously be determined: I3L(b)=-1/2 and I3R(b)=0. From the nonzero value of I3L(b) the top quark can be inferred as the isospin partner of the b quark. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.45.3262
DOI:
10.1103/PhysRevD.45.3262
PACS:
12.15.Ff, 13.38.+c, 13.65.+i, 14.80.Dq
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