Resolution of the $\text{rb}-\text{als}$ crisis of the SM in an exotic ETC scenario

Abstract

In this article we show that the $\text{rb}-\text{als}$ crisis of the SM can be resolved in a commuting TC scenario with sideways gauge bosons only if the ETC representation contains mirror technifermions. For a toy ETC model we estimate the value of ${\xi }_t^2=\text{gel}/\text{guer}$ that is needed to produce the observed LEP excess in $\text{rb}$. It is also shown that the same value of ${\xi }_t^2$ resolvs the $\text{als}$ crisis of the SM but produces a $\delta {\rho }_{new}$ which is barely within the present experimental bound.

Comments: TeX, 8 pages, no figures