Abstract
The vacuum polarization functions of charged and neutral gauge bosons that arise from top and bottom quark loops lead to important shifts in relations between electroweak parameters that can be measured with ever-increasing precision. The large mass of the top quark allows approximation of these functions through the first two terms of an expansion in . The first three terms of the Taylor series of are evaluated analytically up to order . Results for the subleading contributions to and the effective mixing angle are presented.
- Received 28 April 1995
DOI:https://doi.org/10.1103/PhysRevLett.75.3394
©1995 American Physical Society