Constraining Anomalous Top Quark Couplings at the Tevatron

TL;DR

Once sufficient statistics have been accumulated and QCD uncertainties are under control, future high precision measurements at the Fermilab Tevatron will eventually be sensitive to values of {kappa} with magnitudes smaller than {congruent}0.1.

Abstract

We explore the influence of an anomalous chromomagnetic moment, $κ$, onthe production characteristics of top quark pairs at the Tevatron. We find that for top quarks in the 170 GeV mass range, present searches are probing values of $κ$ of order ${1 \over 3}$. For $κ$'s in this range we find that significant enhancements in the both the $q \bar q,~gg \to t \bar t$ production cross sections are obtained. Once top has been verified and QCD uncertainties are under control, future high statistics measurements at the Tevatron will eventually be sensitive to values of $κ$ with magnitudes smaller than 0.10-0.15. We discuss a class of scalar technicolor models which may produce large values of $κ$ in conjunction with generation of $m_t$.