Z→bb¯ versus dynamical electroweak symmetry breaking involving the top quark

Publisher Website
Google Scholar
Abstract
In models of dynamical electroweak symmetry breaking which sensitively involve the third generation, such as top quark condensation, the effects of the new dynamics can show up experimentally in Z→bb¯. We compare the sensitivity of Z→bb¯ and top quark production at the Fermilab Tevatron to models of the new physics. Z→bb¯ is a relatively more sensitive probe to new strongly coupled U(1) gauge bosons, while it is generally less sensitive a probe to new physics involving color octet gauge bosons than is top quark production itself. Nonetheless, to accommodate a significant excess in Z→bb¯ requires choosing model parameters that may be ruled out within run I(b) at the Tevatron.
All Related Versions