Top quark electroweak interactions

Abstract

I discuss how modified EW interactions lead to energy growth in $2\to 2$ scattering amplitudes and how the framework of the Standard Model Effective Field Theory can be used in conjunction with the Goldstone boson equivalence theorem to better understand the origin of such unitarity violating behaviour. I quantify how applications in constraining top quark electroweak couplings are especially motivated due to our relatively poor understanding of them. I present some highlights of a systematic study of energy growth in EW top scattering amplitudes with a focus on how such effects can be searched for in realistic collider processes, demonstrating some promising avenues for future study.

arXiv comment7 pages, 3 figures. Contribution to the 2021 EW session of the 55th Rencontres de Moriond

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• Constraining the SMEFT with a differential cross section measurement of $tWZ$ production at the HL-LHC