Constraining anomalous top quark couplings at the Fermilab Tevatron

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, $\\kappa$,\nonthe production characteristics of top quark pairs at the Tevatron. We find\nthat for top quarks in the 170 GeV mass range, present searches are probing\nvalues of $\\kappa$ of order ${1 \\over 3}$. For $\\kappa$'s in this range we find\nthat significant enhancements in the both the $q \\bar q,~gg \\to t \\bar t$\nproduction cross sections are obtained. Once top has been verified and QCD\nuncertainties are under control, future high statistics measurements at the\nTevatron will eventually be sensitive to values of $\\kappa$ with magnitudes\nsmaller than 0.10-0.15. We discuss a class of scalar technicolor models which\nmay produce large values of $\\kappa$ in conjunction with generation of $m_t$.\n