Effect of partial unitarity requirements on the accuracy of measurements of Wilson coefficients in the processes of three and four top quarks production

The problem of violation of unitarity in the Effective Field Theory of Standard Model (SMEFT) when applied to the processes of three and four top quarks production for relevant efficient operators. Using the optical theorem, boundaries of areas corresponding to the condition of non-violation of partial unitarity were determined. It was shown, how these restrictions affect the accuracy of setting limits on the corresponding Wilson coefficients. It has been established that for the processes under study, the influence of unitary restrictions is noticeable and leads to a deterioration in the accuracy of setting the corresponding limits even at collision energies of 13 and 14 TeV.