CERN Accelerating science

CMS Note
Report number	CMS-CR-2017-193
Title	Electroweak Precision Measurements with Z Bosons at the LHC
Author(s)	Apyan, Aram (Fermilab)
Collaboration	ATLAS, CMS and LHCB Collaborations
Publication	2017
Imprint	10 Jul 2017
Number of pages	8
In:	52nd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 18 - 25 Mar 2017, pp.49-55
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS,CMS,LHCB
Abstract	Measurements of the forward-backward asymmetry in the neutral current annihilation process $q\bar{q} \rightarrow Z/\gamma^{*}\rightarrow \ell^{+}\ell^{-}$, where $\ell$ denotes a muon or electron, at the LHC are reported. The forward-backward asymmetry is measured as a function of the dilepton invariant mass yielding the effective weak mixing angle. The effective weak mixing angle values of $\sin^2\theta_{\mathrm{eff}}^{\mathrm{lept}}=0.2308 \pm 0.0012$ and $\sin^2\theta_{\mathrm{eff}}^{\mathrm{lept}}=0.2314 \pm 0.0011$ are obtained by the ATLAS and LHCb collaborations, respectively. The results are in agreement with the current world average.
Copyright/License	Preprint: (License: CC-BY-4.0)

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