Linear and Quadratic Contributions of SMEFT Operators in Processes of Single Top Quark Production

In this work, the triple differential cross section of the complete process of production with subsequent decay of the top quark is expanded on the inverse scale of new physics, taking into account the denominator with the width of the top quark, which depends on the constants of the SMEFT operators. A study was carried out of the influence of linear and quadratic terms of the expansion into the differential section depending on $$\hat {s}$$ .