Abstract
In this paper, we examine the interactions of the top quarks with the $Z$ boson using the top quark pair production associated with neutrino pair ($t\bar{t}\nu_{l}\bar{\nu_{l}}$) at the LHC. In particular, potential constraints on the anomalous electroweak top-quark interactions are determined by considering two opposite-sign charged leptons, missing energy, and two b-tagged jets in the final state. The analysis is performed for a High Luminosity scenario of the LHC with an integrated luminosity of 3 ab$^{-1}$ of proton-proton collisions at a center-of-mass energy of 14 TeV. The $95\%$ confidence intervals are computed on the anomalous couplings considering a realistic detector simulation of an upgraded CMS detector including an average of 200 proton-proton interactions per bunch crossing. We find that the $t\bar{t}\nu_{l}\bar{\nu_{l}}$ channel can provide stringent bounds on the relevant Wilson coefficients and has the potential to serve as an additional handle beside the $t\bar{t}Z(Z\rightarrow l^{+}l^{-})$ and other channels to search for new physics.
Highlights
The main task of the Large Haron Collider (LHC) is to make an inquiry for possible effects of new physics beyond the Standard Model (SM)
We find that the ttνlνl channel can provide stringent bounds on the relevant Wilson coefficients and has the potential to serve as an additional handle beside the ttZðZ → lþl−Þ and other channels to search for new physics
For the sake of searching for the effects of possible new physics beyond the SM, one may concentrate on the SM effective field theory framework in which dimension-six operators are considered
Summary
The main task of the Large Haron Collider (LHC) is to make an inquiry for possible effects of new physics beyond the Standard Model (SM). The phenomenological studies have become largely model independent, and data are interpreted in the framework of the SM effective field theory (EFT) [1,2,3]. The effective field theory extension of SM is a power tool which could be considered as a bridge between the measurements at a low energy scale and the unknown UV completion theory. Within the framework of the effective field theory of the SM, the new physics effects can be parametrized by a series of SUð3Þc × SUð2ÞL × Uð1ÞY gauge invariant dimension-six operators Oi built out of the SM fields. The coefficients of the operators are suppressed by the inverse power of the new physics characteristic scale Λ [2,3], Leff
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