Using the Higgs boson to probe the littlest Higgs model with T-parity through Zₕ Wₕ production at the LHC

Original · EN

In the littlest Higgs model with T-parity, the production cross section of the T-odd heavy gauge boson pair Zₕ Wₕ is quite sizable at the LHC. In addition, both the Wₕ and Zₕ bosons have almost exclusively one decay channel into W Aₕ and H Aₕ respectively, where the dark matter candidate Aₕ yields a large missing energy signal. Upon the discovery of the Higgs boson at 125 GeV, we study the discovery sensitivity of the final state pp → bb l+/Eₜ to probe the model at the LHC. We find that the standard model backgrounds are manageable by applying suitable kinematic cuts. The LHC running at √s=14 TeV with a 100/fb total luminosity is sensitive to the model if the symmetry breaking scale f is below about 850 GeV.