A New Twist on $Z\to b\bar{b}$

Abstract

A new mechanism is proposed to explain the "anomaly" in $Z\to b\bar{b}$ resulting in a prediction of a new, non-sequential fourth family whose masses could all be below $M_W$, thus opening up an exciting porpect for near-future discoveries at LEP2 and possibly at the Tevatron.

Comments: 12 pages, RevTex, 1 figure uuencoded (hard copy can be obtained upon request at hung@athena.phys.virginia.edu)