Speaker
Description
The physics program of the LHC and the High-Luminosity LHC (HL-LHC) demands increasingly precise theoretical predictions. This is particularly crucial for measurements relying on template fit methods, where Monte Carlo event generators are used to produce event samples as a function of the parameter of interest, and the physical observable is extracted by fitting these templates to the data. In this approach, theoretical uncertainties in the Monte Carlo predictions translate directly into theoretical systematic uncertainties in the final measurement.
A prime example is the determination of the effective weak mixing angle from the forward-backward asymmetry in neutral-current Drell-Yan processes. In this contribution, we analyze specific electroweak theoretical uncertainties affecting the extraction of the weak mixing angle, extending the analysis from the Z-pole up to the TeV scale. We focus in particular on the impact of weak corrections beyond NLO and on the role of the electroweak input parameter scheme. We investigate both parametric uncertainties and those arising from technical details of the calculation, such as the treatment of resonances. The results presented are obtained using the latest release of the Z_ew-BMNNPV generator within the POWHEG BOX framework.
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