Abstract
We list all possible dimension-six -conserving SU-invariant operators involving the third-family quarks which could be generated by new physics at a higher scale. Expressions for these operators after electroweak gauge symmetry breaking and the induced effective couplings , , and are presented. Analytic expressions for the tree level contributions of all these operators to the observables and at CERN LEP I, and at LEP II, and at the Next Linear Collider (NLC), as well as at the Fermilab Tevatron upgrade, are provided. The effects of these operators on different electroweak observables are discussed and numerical examples presented. Numerical analyses show that in the coupling region allowed by and at LEP I, some of the new physics operators can still have significant contributions at LEP II, the Tevatron, and the NLC.
- Received 11 February 1997
DOI:https://doi.org/10.1103/PhysRevD.56.467
©1997 American Physical Society