Constraints on Anomalous Top Quark Couplings at the LHC

Abstract

Measurements of distributions associated with the pair production of top quarks at the LHC can be used to constrain (or observe) the anomalous chromomagnetic dipole moment($κ$) of the top. For example, using either the $t\bar t$ invariant mass or the $p_t$ distribution of top we find that sensitivities to $|κ|$ of order 0.05 are obtainable with 100 $fb^{-1}$ of integrated luminosity. This is similar in magnitude to what can be obtained at a 500 GeV NLC with an integrated luminosity of 50 $fb^{-1}$ through an examination of the $e^+e^- \to t\bar tg$ process. [To appear in the Proceedings of the 1996 DPF/DPB Summer Study on NewDirections for High Energy Physics-Snowmass96, Snowmass, CO, 25 June-12 July, 1996.]