Abstract
A number of LHC resonance search channels display an excess in the invariant mass region of 1.8–2.0 TeV. Among them is a 3.4σ excess in the fully hadronic decay of a pair of Standard Model electroweak gauge bosons, in addition to potential signals in the HW anddijetfinalstates. Weperformamodel-independentcross-sectionfittotheresults of all ATLAS and CMS searches sensitive to these final states. We then interpret these results in the context of the Left-Right Symmetric Model, based on the extended gauge group SU(2) L × SU(2) R × U(1)′, and show that a heavy right-handed gauge boson W R can naturally explain the current measurements with just a single coupling g R ∼ 0.4. In addition, we discuss a possible connection to dark matter.
Highlights
A number of LHC resonance search channels display an excess in the invariant mass region of 1.8–2.0 TeV
In this study we have analyzed the observed resonant excesses that appear in different ATLAS and CMS search channels in the invariant mass region of 1.8–2.0 TeV
The most prominent of these displays a 3.4 σ excess in the search for the hadronic decay of a W Z final state, though this peak is sensitive to other diboson states
Summary
We give an overview over the ATLAS and CMS searches in which resonances in the mass range 1.8–2.0 TeV have been observed, or which provide constraints in the same or closely related final states. The systematic uncertainties on the background prediction b and on the signal efficiency ε are approximated by Gaussian distributions We calculate a p value for each signal cross section in each different final state, using at least 10 000 pseudo-experiments. This gives us the significance of the deviation from the SM, best fit points, and confidence regions at 68% and 90% CL. In some of the signal regions, our simple cut-and-count strategy leads to model limits that are stronger than those presented by the experiments In this case, the systematical background error and the signal efficiencies were rescaled to find agreement. We present the results in terms of p0 values, best fit points, and confidence regions at 68% and 90% CL
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
