Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-09-09
Phys.Lett. B416 (1998) 129-136
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 1 fig., LaTeX, typos corrected, improved referencing
Scientific paper
10.1016/S0370-2693(97)01304-X
We show that an effective field theory that includes non-standard couplings between the electroweak gauge bosons and the top and bottom quarks may yield negative contributions to both the S and T oblique radiative electroweak parameters. We find that that such an effective field theory provides a better fit to data than the standard model (the chi-squared per degree of freedom is half as large). We examine in some detail an illustrative model where the exchange of heavy scalars produces the correct type of non-standard couplings.
Dobrescu Bogdan A.
Terning John
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