First determination of the quark mixing matrix element Vtb independent of assumptions of unitarity

الأصل · EN

We present a new method for the determination of the Cabibbo-Kobayashi-Maskawa quark mixing matrix element |Vtb| from electroweak loop corrections, in particular those affecting the process Z→ bb. From a combined analysis of results from the LEP, SLC, Tevatron, and neutrino scattering experiments we determine |Vtb| = 0.77⁺⁰.¹⁸₋₀.₂₄. This is the first determination of |Vtb| which is independent of unitarity assumptions.