Precise determination of Z-Z' mixing at the CERN LHC

2014/06/30 by V. V. Andreev, P. Osland, A. A. Pankov · 1 citation
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1103/physrevd.90.055025

published as Phys. Rev. D 90, 055025 (2014) · 22 pages, 7 figures. PRD version

arxiv created 2014/10/10 · arxiv updated 2014/10/13

Abstract

We discuss the expected sensitivity to Z' boson effects in the W^± boson pair production process at the Large Hadron Collider (LHC). The results of a model-dependent analysis of Z' boson effects are presented as constraints on the Z-Z' mixing angle phi and Z' boson mass. The process pp→ W⁺W^- + X allows to place stringent constraints on the Z-Z' mixing angle. Specifically, we find that the present LHC bounds on the mixing angle are of the order a few times 10^-3, what is of the same order as those derived from the electroweak data. These results were derived from analysis of W-pair production at sqrts=8 TeV and integrated luminosity of 20 fb^-1. Further improvement on the constraining of this mixing can be achieved from the analysis of data on WW → l nu l'nu' (l,l'=e or mu) and WW → l nu jj final states collected at the LHC with nominal energy and luminosity, 14 TeV and 100 fb^-1, and should be phi ∼ 10^-4-10^-3.

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