The anomalous $Wtb$ vertex and top-pair production at the LHC

Abstract

We perform an exclusive study of the anomalous $Wtb$ interaction in the context of LHC. The limits on $Wtb$ anomalous couplings have been estimated via the measurements of the top-quark decay width and cross-section as well as production asymmetries in case the CP is violated. Our investigations reveal that the upper bounds on $(|C_L|,|C_R|)$ would be of about (1.82, 0.03) $\times 10^{-4}$ at $2.5\sigma$ C.L., for the already collected data at the LHC with $\sqrt{S}=13$ TeV for an integrated luminosity of 139 fb${}^{-1}$. The corresponding limits for future hadron colliders, namely, High Luminosity LHC (HL-LHC), High Energy LHC (HE-LHC) and Future Circular Collider (FCC-hh) for the projected luminosities of 3 ab${}^{-1}$, 12 ab${}^{-1}$ and 30 ab${}^{-1}$ are found to be to $(0.81,0.006)\times 10^{-4}$, $(0.44,0.0017)\times 10^{-4}$ and $(0.21,0.0004)\times 10^{-4}$ respectively at 2.5$\sigma$ C. L..

Comments: 18 pages, 11 figures