What can we learn from the Z → bbbar vertex?
Abstract
I stress the fact that a complete study of possible New Physics effects in the $Z \rightarrow b\bar{b}$ vertex requires a combined analysis of the ratio $R_b= \Gamma(Z \rightarrow b\bar{b})/ \Gamma(Z \rightarrow hadrons)$ and the longitudinally polarized forward backward asymmetry, $A_b$. This is illustrated with a number of models such as the two Higgs-doublet model, the MSSM, Technicolour and models with an extra $Z'$. The use of effective lagrangean techniques is briefly discussed.
- Publication:
-
1995 Electroweak Interactions Unified Theories
- Pub Date:
- 1995
- DOI:
- 10.48550/arXiv.hep-ph/9505439
- arXiv:
- arXiv:hep-ph/9505439
- Bibcode:
- 1995eiut.conf...49C
- Keywords:
-
- High Energy Physics - Phenomenology
- E-Print:
- 4 pages,no figures, to appear in Proc. of XXXth Rencontres de Moriond Les Arcs France