Precise determination of Z-Zmixing at the CERN LHC

We discuss the expected sensitivity to Zboson effects in the W ± boson pair production process at the Large Hadron Collider (LHC). The results of a model-dependent analysis of Zboson effects are presented as constraints on the Z-Zmixing angleand Zboson mass. The process pp → W + W − +X allows to place stringent constraints on the Z-Zmixing 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 √ s = 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 → ll ' � ' (l,l ' = e or µ) and WW → ljj final states collected at the LHC with nominal energy and luminosity, 14