A Remark on the $Z^0\to b\bar{b}$ Width

Abstract

The $Z^0\to b\bar{b}$ width, ${\Gamma }_b$, is analysed in conjunction with the total and hadronic $Z^0$ widths, ${\Gamma }_T$ and ${\Gamma }_h$. Assuming, tentatively, that the present 2$\sigma$ discrepancy in ${\Gamma }_b$ will substantiate as time goes on, for large values of $m_H$ it will be sufficient to modify the $Z^{0}b\bar{b}$ vertex only. In contrast, for small values of $m_H$, the theoretical predictions for both the $Z^0$ width into light quarks and leptons as well as the $Z^0\to b\bar{b}$ vertex will have to be modified.

8 pages uuencoded postscript including 2 figures

Cited by in corpus (1)

• New fermions and a vector-like third generation in $SU(3{)}_c\otimes SU(3{)}_L\otimes U(1{)}_N$ models