Exploring SMEFT operators in the tHq production at the LHC

TL;DR

This paper investigates the effects of SMEFT operators on tHq production at the LHC, constraining Wilson Coefficients using recent data and exploring their impact on observable signals at 13 TeV.

Contribution

It develops a strategy to constrain SMEFT Wilson Coefficients from LHC data and demonstrates their potential effects on tHq kinematic observables.

Findings

Best-fit Wilson Coefficients are identified.

Potential for signal excess at 13 TeV with high luminosity.

Feasibility of detecting SMEFT effects in tHq production.

Abstract

We study the top-quark production along with a Higgs boson and a jet (tHq) at the LHC experiment within the framework of the Standard Model Effective Field Theory (SMEFT). A strategy is developed to constrain the Wilson Coefficients (WC) corresponding to the associated SMEFT operators using the latest LHC measurements. The best-fit values of these WCs are presented. Finally, we demonstrate the feasibility of finding the effects of these operators on various kinematical observables of the tHq process at the LHC. We find that for a set of best-fitted values of the considered WCs, the excess of signal over the backgrounds can be achieved with a reasonable significance at the center of mass energy $\sqrt{s}=13$ TeV and for integrated luminosity options ${\cal L}=$300 $\rm fb^{-1}$ and 3000 $\rm fb^{-1}$.