Precise determination of Z-Z' mixing at the CERN LHC
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 ϕ and Z' boson mass. The process pp→W+W-+X allows us 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, which 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→lν l'ν' (l,l'=e or μ) and WW→lνjj final states collected at the LHC with nominal energy and luminosity, 14 TeV and 100 fb-1, and should be ϕ ∼10-4-10-3.
- Publication:
-
Physical Review D
- Pub Date:
- September 2014
- DOI:
- 10.1103/PhysRevD.90.055025
- arXiv:
- arXiv:1406.6776
- Bibcode:
- 2014PhRvD..90e5025A
- Keywords:
-
- 12.60.-i;
- 12.60.Cn;
- 14.70.Fm;
- 29.20.Ej;
- Models beyond the standard model;
- Extensions of electroweak gauge sector;
- W bosons;
- Linear accelerators;
- High Energy Physics - Phenomenology
- E-Print:
- 22 pages, 7 figures. PRD version