We calculate the non-universal correction to the Zbb vertex in a simple extension of the Standard Model, where a charge +2/3 isosinglet quark is added to the standard spectrum. Comparison is made with other solutions to Rb (and Rc) that demand particles lighter than Mw.
|頁（從 - 到）||544-550|
|期刊||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|出版狀態||已發佈 - 1996 十月 24|
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