Forward-Backward Charge Asymmetry in Z Production at the LHC

TL;DR

This paper discusses a precise measurement of the effective weak mixing angle using the Forward-Backward Asymmetry in Z boson production at the LHC, emphasizing electron identification techniques in the ATLAS detector.

Contribution

It demonstrates that a multivariate analysis can achieve high electron-jet rejection and efficient electron reconstruction in the forward regions of the ATLAS detector.

Findings

Achieved a statistical precision of 10^{-4} in measuring the asymmetry.

Demonstrated electron-jet rejection of over 100 with >50% electron reconstruction efficiency.

Validated the feasibility of precise electroweak measurements in the forward detector regions.

Abstract

We present here a study on the determination of the effective weak mixing angle, $\sin^{2}\theta^{lept}_{eff}$ from the measurement of the Forward-Backward Asymmetry with a high a statistical precision, 10$^{-4}$. To reach such a precision it is necessary to identify the electrons in the forward regions of the ATLAS detector. It is demonstrated that one can reach an electron-jet rejection of more than 100 with an efficiency on electron reconstruction better than 50%, by using a multivariate analysis.